Print human-readable OEM managed states

For NetworkTemplate and NetworkIdentity, print human-readable
representations of the OEM managed state in the classes' respective
toString() functions.

Bug: 180557699
Test: Manual - run atest NetworkTemplateTest NetworkIdentityTest
and verify that the logcat output shows the String representation of the
OEM managed state correctly.

Change-Id: Ia180b911f91f41937ac713e6b3691d82f682e146

core/java/android/net/NetworkIdentity.java

@@ -26,8 +26,10 @@ import android.service.NetworkIdentityProto;
 import android.telephony.Annotation.NetworkType;
 import android.util.proto.ProtoOutputStream;
 
+import com.android.net.module.util.NetworkCapabilitiesUtils;
 import com.android.net.module.util.NetworkIdentityUtils;
 
+import java.util.ArrayList;
 import java.util.Objects;
 
 /**
@@ -121,11 +123,37 @@ public class NetworkIdentity implements Comparable<NetworkIdentity> {
         }
         builder.append(", metered=").append(mMetered);
         builder.append(", defaultNetwork=").append(mDefaultNetwork);
-        // TODO(180557699): Print a human readable string for OEM managed state.
-        builder.append(", oemManaged=").append(mOemManaged);
+        builder.append(", oemManaged=").append(getOemManagedNames(mOemManaged));
         return builder.append("}").toString();
     }
 
+    /**
+     * Get the human readable representation of a bitfield representing the OEM managed state of a
+     * network.
+     */
+    static String getOemManagedNames(int oemManaged) {
+        if (oemManaged == OEM_NONE) {
+            return "OEM_NONE";
+        }
+        final int[] bitPositions = NetworkCapabilitiesUtils.unpackBits(oemManaged);
+        final ArrayList<String> oemManagedNames = new ArrayList<String>();
+        for (int position : bitPositions) {
+            oemManagedNames.add(nameOfOemManaged(1 << position));
+        }
+        return String.join(",", oemManagedNames);
+    }
+
+    private static String nameOfOemManaged(int oemManagedBit) {
+        switch (oemManagedBit) {
+            case OEM_PAID:
+                return "OEM_PAID";
+            case OEM_PRIVATE:
+                return "OEM_PRIVATE";
+            default:
+                return "Invalid(" + oemManagedBit + ")";
+        }
+    }
+
     public void dumpDebug(ProtoOutputStream proto, long tag) {
         final long start = proto.start(tag);
 

core/java/android/net/NetworkTemplate.java

@@ -344,7 +344,7 @@ public class NetworkTemplate implements Parcelable {
             builder.append(", subType=").append(mSubType);
         }
         if (mOemManaged != OEM_MANAGED_ALL) {
-            builder.append(", oemManaged=").append(mOemManaged);
+            builder.append(", oemManaged=").append(getOemManagedNames(mOemManaged));
         }
         return builder.toString();
     }
@@ -640,6 +640,19 @@ public class NetworkTemplate implements Parcelable {
         }
     }
 
+    private static String getOemManagedNames(int oemManaged) {
+        switch (oemManaged) {
+            case OEM_MANAGED_ALL:
+                return "OEM_MANAGED_ALL";
+            case OEM_MANAGED_NO:
+                return "OEM_MANAGED_NO";
+            case OEM_MANAGED_YES:
+                return "OEM_MANAGED_YES";
+            default:
+                return NetworkIdentity.getOemManagedNames(oemManaged);
+        }
+    }
+
     /**
      * Examine the given template and normalize if it refers to a "merged"
      * mobile subscriber. We pick the "lowest" merged subscriber as the primary