DO NOT MERGE: Revert "Reset app routes when global a2dp state changed"

This reverts commit 07e40316f8.

Bug: 193831720, Bug: 168093983, Bug: 156549746
Test: manual
Change-Id: I86df6f9f1d672c455cd0aedc58012b3335659479
(cherry picked from commit 6d4a00b17a)

media/java/android/media/IMediaRouterClient.aidl

@@ -23,5 +23,4 @@ oneway interface IMediaRouterClient {
     void onStateChanged();
     void onRestoreRoute();
     void onGroupRouteSelected(String routeId);
-    void onGlobalA2dpChanged(boolean a2dpOn);
 }

media/java/android/media/MediaRouter.java

@@ -654,10 +654,13 @@ public class MediaRouter {
         final class Client extends IMediaRouterClient.Stub {
             @Override
             public void onStateChanged() {
-                mHandler.post(() -> {
+                mHandler.post(new Runnable() {
+                    @Override
+                    public void run() {
                         if (Client.this == mClient) {
                             updateClientState();
                         }
+                    }
                 });
             }
 
@@ -690,22 +693,6 @@ public class MediaRouter {
                     }
                 });
             }
-
-            // Called when the selection of a connected device (phone speaker or BT devices)
-            // is changed.
-            @Override
-            public void onGlobalA2dpChanged(boolean a2dpOn) {
-                mHandler.post(() -> {
-                    if (mSelectedRoute == null) {
-                        return;
-                    }
-                    if (mSelectedRoute.isDefault() && a2dpOn) {
-                        setSelectedRoute(mBluetoothA2dpRoute, /*explicit=*/false);
-                    } else if (mSelectedRoute.isBluetooth() && !a2dpOn) {
-                        setSelectedRoute(mDefaultAudioVideo, /*explicit=*/false);
-                    }
-                });
-            }
         }
     }
 

services/core/java/com/android/server/media/MediaRouterService.java

@@ -903,26 +903,8 @@ public final class MediaRouterService extends IMediaRouterService.Stub
             if (intent.getAction().equals(BluetoothA2dp.ACTION_ACTIVE_DEVICE_CHANGED)) {
                 BluetoothDevice btDevice = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
                 synchronized (mLock) {
-                    boolean wasA2dpOn = mGlobalBluetoothA2dpOn;
                     mActiveBluetoothDevice = btDevice;
                     mGlobalBluetoothA2dpOn = btDevice != null;
-                    if (wasA2dpOn != mGlobalBluetoothA2dpOn) {
-                        Slog.d(TAG, "GlobalBluetoothA2dpOn is changed to '"
-                                + mGlobalBluetoothA2dpOn + "'");
-                        UserRecord userRecord = mUserRecords.get(mCurrentUserId);
-                        if (userRecord != null) {
-                            for (ClientRecord cr : userRecord.mClientRecords) {
-                                // mSelectedRouteId will be null for BT and phone speaker.
-                                if (cr.mSelectedRouteId == null) {
-                                    try {
-                                        cr.mClient.onGlobalA2dpChanged(mGlobalBluetoothA2dpOn);
-                                    } catch (RemoteException e) {
-                                        // Ignore exception
-                                    }
-                                }
-                            }
-                        }
-                    }
                 }
             }
         }