[CS17]Remove useless code(AsyncChannel) from ConnectivityService

The caller of AsyncChannel has been deleted in the last commit
(Remove legacy network factories), so the useless code of
AsyncChannel should also be deleted.

Bug: 170917042
Test: atest FrameworksNetTests
Change-Id: I6ce164fe5e3d592f1ed63753e8d3c0086bf61fa2

services/core/java/com/android/server/ConnectivityService.java

@@ -189,7 +189,6 @@ import com.android.connectivity.aidl.INetworkAgent;
 import com.android.internal.R;
 import com.android.internal.annotations.GuardedBy;
 import com.android.internal.annotations.VisibleForTesting;
-import com.android.internal.util.AsyncChannel;
 import com.android.internal.util.IndentingPrintWriter;
 import com.android.internal.util.LocationPermissionChecker;
 import com.android.internal.util.MessageUtils;
@@ -343,8 +342,7 @@ public class ConnectivityService extends IConnectivityManager.Stub
     private String mCurrentTcpBufferSizes;
 
     private static final SparseArray<String> sMagicDecoderRing = MessageUtils.findMessageNames(
-            new Class[] { AsyncChannel.class, ConnectivityService.class, NetworkAgent.class,
+            new Class[] { ConnectivityService.class, NetworkAgent.class, NetworkAgentInfo.class });
-                    NetworkAgentInfo.class });
 
     private enum ReapUnvalidatedNetworks {
         // Tear down networks that have no chance (e.g. even if validated) of becoming
@@ -2886,22 +2884,6 @@ public class ConnectivityService extends IConnectivityManager.Stub
             super(looper);
         }
 
-        private boolean maybeHandleAsyncChannelMessage(Message msg) {
-            switch (msg.what) {
-                default:
-                    return false;
-                case AsyncChannel.CMD_CHANNEL_HALF_CONNECTED: {
-                    handleAsyncChannelHalfConnect(msg);
-                    break;
-                }
-                case AsyncChannel.CMD_CHANNEL_DISCONNECTED: {
-                    handleAsyncChannelDisconnected(msg);
-                    break;
-                }
-            }
-            return true;
-        }
-
         private void maybeHandleNetworkAgentMessage(Message msg) {
             final Pair<NetworkAgentInfo, Object> arg = (Pair<NetworkAgentInfo, Object>) msg.obj;
             final NetworkAgentInfo nai = arg.first;
@@ -3193,8 +3175,7 @@ public class ConnectivityService extends IConnectivityManager.Stub
 
         @Override
         public void handleMessage(Message msg) {
-            if (!maybeHandleAsyncChannelMessage(msg)
+            if (!maybeHandleNetworkMonitorMessage(msg)
-                    && !maybeHandleNetworkMonitorMessage(msg)
                     && !maybeHandleNetworkAgentInfoMessage(msg)) {
                 maybeHandleNetworkAgentMessage(msg);
             }
@@ -3458,21 +3439,6 @@ public class ConnectivityService extends IConnectivityManager.Stub
         return false;
     }
 
-    private void handleAsyncChannelHalfConnect(Message msg) {
-        ensureRunningOnConnectivityServiceThread();
-        if (mNetworkProviderInfos.containsKey(msg.replyTo)) {
-            if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) {
-                if (VDBG) log("NetworkFactory connected");
-                // Finish setting up the full connection
-                NetworkProviderInfo npi = mNetworkProviderInfos.get(msg.replyTo);
-                sendAllRequestsToProvider(npi);
-            } else {
-                loge("Error connecting NetworkFactory");
-                mNetworkProviderInfos.remove(msg.obj);
-            }
-        }
-    }
-
     private void handleNetworkAgentRegistered(Message msg) {
         final NetworkAgentInfo nai = (NetworkAgentInfo) msg.obj;
         if (!mNetworkAgentInfos.contains(nai)) {
@@ -3503,14 +3469,6 @@ public class ConnectivityService extends IConnectivityManager.Stub
         }
     }
 
-    // This is a no-op if it's called with a message designating a provider that has
-    // already been destroyed, because its reference will not be found in the relevant
-    // maps.
-    private void handleAsyncChannelDisconnected(Message msg) {
-        NetworkProviderInfo npi = mNetworkProviderInfos.remove(msg.replyTo);
-        if (DBG && npi != null) log("unregisterNetworkFactory for " + npi.name);
-    }
-
     // Destroys a network, remove references to it from the internal state managed by
     // ConnectivityService, free its interfaces and clean up.
     // Must be called on the Handler thread.
@@ -5151,8 +5109,8 @@ public class ConnectivityService extends IConnectivityManager.Stub
         private final IBinder.DeathRecipient mDeathRecipient;
         public final int providerId;
 
-        NetworkProviderInfo(String name, Messenger messenger, AsyncChannel asyncChannel,
+        NetworkProviderInfo(String name, Messenger messenger, int providerId,
-                int providerId, @NonNull IBinder.DeathRecipient deathRecipient) {
+                @NonNull IBinder.DeathRecipient deathRecipient) {
             this.name = name;
             this.messenger = messenger;
             this.providerId = providerId;
@@ -5826,8 +5784,7 @@ public class ConnectivityService extends IConnectivityManager.Stub
     public int registerNetworkProvider(Messenger messenger, String name) {
         enforceNetworkFactoryOrSettingsPermission();
         NetworkProviderInfo npi = new NetworkProviderInfo(name, messenger,
-                null /* asyncChannel */, nextNetworkProviderId(),
+                nextNetworkProviderId(), () -> unregisterNetworkProvider(messenger));
-                () -> unregisterNetworkProvider(messenger));
         mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_PROVIDER, npi));
         return npi.providerId;
     }