[MS07.1] Move NetworkStatsCollection/IdentitySet into frameworks

These files are needed for the data migration util system Api
interfaces to allow OEMs to construct NetworkStats* objects.
Thus, they need to be moved into android.net package, and some
of them will be exposed as @SystemApi in T.

Eventually these classes will be moved into the Connectivity
module, but in the mean time they will be temporarily moved to
f/b/package/ConnectivityT for the preparation stage.
However, the tests are already in the module. Therefore for
the S-derived branch, the test cannot see the renamed classes
since any framework CLs will not be auto-merged into this branch.
Thus, the tests need to stay disabled on the S-derived branch,
and will be re-enabled after all files are moved into the module.

Test: TH
Bug: 197717846

Change-Id: I95278a99cf2437ada28001161ceea17a1d32f2a4

framework-t/src/android/net/NetworkIdentitySet.java

@@ -14,9 +14,10 @@
  * limitations under the License.
  */
 
-package com.android.server.net;
+package android.net;
+
+import static android.net.ConnectivityManager.TYPE_MOBILE;
 
-import android.net.NetworkIdentity;
 import android.service.NetworkIdentitySetProto;
 import android.util.proto.ProtoOutputStream;
 
@@ -25,8 +26,6 @@ import java.io.DataOutput;
 import java.io.IOException;
 import java.util.HashSet;
 
-import static android.net.ConnectivityManager.TYPE_MOBILE;
-
 /**
  * Identity of a {@code iface}, defined by the set of {@link NetworkIdentity}
  * active on that interface.
@@ -97,6 +96,9 @@ public class NetworkIdentitySet extends HashSet<NetworkIdentity> implements
         }
     }
 
+    /**
+     * Method to serialize this object into a {@code DataOutput}.
+     */
     public void writeToStream(DataOutput out) throws IOException {
         out.writeInt(VERSION_ADD_OEM_MANAGED_NETWORK);
         out.writeInt(size());
@@ -179,6 +181,9 @@ public class NetworkIdentitySet extends HashSet<NetworkIdentity> implements
         return ident.compareTo(anotherIdent);
     }
 
+    /**
+     * Method to dump this object into proto debug file.
+     */
     public void dumpDebug(ProtoOutputStream proto, long tag) {
         final long start = proto.start(tag);
 

framework-t/src/android/net/NetworkStatsAccess.java

@@ -11,10 +11,10 @@
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
- * limitations under the License
+ * limitations under the License.
  */
 
-package com.android.server.net;
+package android.net;
 
 import static android.Manifest.permission.READ_NETWORK_USAGE_HISTORY;
 import static android.net.NetworkStats.UID_ALL;
@@ -37,7 +37,11 @@ import com.android.server.LocalServices;
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
 
-/** Utility methods for controlling access to network stats APIs. */
+/**
+ * Utility methods for controlling access to network stats APIs.
+ *
+ * @hide
+ */
 public final class NetworkStatsAccess {
     private NetworkStatsAccess() {}
 

framework-t/src/android/net/NetworkStatsCollection.java

@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package com.android.server.net;
+package android.net;
 
 import static android.net.NetworkStats.DEFAULT_NETWORK_NO;
 import static android.net.NetworkStats.DEFAULT_NETWORK_YES;
@@ -31,13 +31,7 @@ import static android.net.TrafficStats.UID_REMOVED;
 import static android.text.format.DateUtils.WEEK_IN_MILLIS;
 
 import static com.android.internal.net.NetworkUtilsInternal.multiplySafeByRational;
-import static com.android.server.net.NetworkStatsService.TAG;
 
-import android.net.NetworkIdentity;
-import android.net.NetworkStats;
-import android.net.NetworkStatsHistory;
-import android.net.NetworkTemplate;
-import android.net.TrafficStats;
 import android.os.Binder;
 import android.service.NetworkStatsCollectionKeyProto;
 import android.service.NetworkStatsCollectionProto;
@@ -85,8 +79,11 @@ import java.util.Objects;
 /**
  * Collection of {@link NetworkStatsHistory}, stored based on combined key of
  * {@link NetworkIdentitySet}, UID, set, and tag. Knows how to persist itself.
+ *
+ * @hide
  */
 public class NetworkStatsCollection implements FileRotator.Reader, FileRotator.Writer {
+    private static final String TAG = NetworkStatsCollection.class.getSimpleName();
     /** File header magic number: "ANET" */
     private static final int FILE_MAGIC = 0x414E4554;
 
@@ -366,8 +363,8 @@ public class NetworkStatsCollection implements FileRotator.Reader, FileRotator.W
                 entry.uid = key.uid;
                 entry.set = key.set;
                 entry.tag = key.tag;
-                entry.defaultNetwork = key.ident.areAllMembersOnDefaultNetwork() ?
-                        DEFAULT_NETWORK_YES : DEFAULT_NETWORK_NO;
+                entry.defaultNetwork = key.ident.areAllMembersOnDefaultNetwork()
+                        ? DEFAULT_NETWORK_YES : DEFAULT_NETWORK_NO;
                 entry.metered = key.ident.isAnyMemberMetered() ? METERED_YES : METERED_NO;
                 entry.roaming = key.ident.isAnyMemberRoaming() ? ROAMING_YES : ROAMING_NO;
                 entry.rxBytes = historyEntry.rxBytes;
@@ -521,6 +518,12 @@ public class NetworkStatsCollection implements FileRotator.Reader, FileRotator.W
         }
     }
 
+    /**
+     * Read legacy network summary statistics file format into the collection,
+     * See {@code NetworkStatsService#maybeUpgradeLegacyStatsLocked}.
+     *
+     * @deprecated
+     */
     @Deprecated
     public void readLegacyNetwork(File file) throws IOException {
         final AtomicFile inputFile = new AtomicFile(file);
@@ -560,6 +563,12 @@ public class NetworkStatsCollection implements FileRotator.Reader, FileRotator.W
         }
     }
 
+    /**
+     * Read legacy Uid statistics file format into the collection,
+     * See {@code NetworkStatsService#maybeUpgradeLegacyStatsLocked}.
+     *
+     * @deprecated
+     */
     @Deprecated
     public void readLegacyUid(File file, boolean onlyTags) throws IOException {
         final AtomicFile inputFile = new AtomicFile(file);
@@ -774,19 +783,19 @@ public class NetworkStatsCollection implements FileRotator.Reader, FileRotator.W
         public final int set;
         public final int tag;
 
-        private final int hashCode;
+        private final int mHashCode;
 
-        public Key(NetworkIdentitySet ident, int uid, int set, int tag) {
+        Key(NetworkIdentitySet ident, int uid, int set, int tag) {
             this.ident = ident;
             this.uid = uid;
             this.set = set;
             this.tag = tag;
-            hashCode = Objects.hash(ident, uid, set, tag);
+            mHashCode = Objects.hash(ident, uid, set, tag);
         }
 
         @Override
         public int hashCode() {
-            return hashCode;
+            return mHashCode;
         }
 
         @Override

service-t/src/com/android/server/net/NetworkStatsObservers.java

@@ -22,7 +22,10 @@ import static com.android.internal.util.Preconditions.checkArgument;
 
 import android.app.usage.NetworkStatsManager;
 import android.net.DataUsageRequest;
+import android.net.NetworkIdentitySet;
 import android.net.NetworkStats;
+import android.net.NetworkStatsAccess;
+import android.net.NetworkStatsCollection;
 import android.net.NetworkStatsHistory;
 import android.net.NetworkTemplate;
 import android.os.Bundle;

service-t/src/com/android/server/net/NetworkStatsRecorder.java

@@ -21,8 +21,11 @@ import static android.net.TrafficStats.KB_IN_BYTES;
 import static android.net.TrafficStats.MB_IN_BYTES;
 import static android.text.format.DateUtils.YEAR_IN_MILLIS;
 
+import android.net.NetworkIdentitySet;
 import android.net.NetworkStats;
 import android.net.NetworkStats.NonMonotonicObserver;
+import android.net.NetworkStatsAccess;
+import android.net.NetworkStatsCollection;
 import android.net.NetworkStatsHistory;
 import android.net.NetworkTemplate;
 import android.net.TrafficStats;

service-t/src/com/android/server/net/NetworkStatsService.java

@@ -96,11 +96,14 @@ import android.net.INetworkStatsSession;
 import android.net.Network;
 import android.net.NetworkCapabilities;
 import android.net.NetworkIdentity;
+import android.net.NetworkIdentitySet;
 import android.net.NetworkSpecifier;
 import android.net.NetworkStack;
 import android.net.NetworkStateSnapshot;
 import android.net.NetworkStats;
 import android.net.NetworkStats.NonMonotonicObserver;
+import android.net.NetworkStatsAccess;
+import android.net.NetworkStatsCollection;
 import android.net.NetworkStatsHistory;
 import android.net.NetworkTemplate;
 import android.net.TelephonyNetworkSpecifier;