Fix bug 5327199 Recycle bitmaps in RemoteControlClient

When applying the new bitmap from the editor to the client,
 recycle the old bitmap, and set the reference to the editor
 bitmap to null.

Change-Id: I7d79e4b8410e5035fa51b20be4b1ada391c84c28

media/java/android/media/RemoteControlClient.java

@@ -482,7 +482,11 @@ public class RemoteControlClient
             synchronized(mCacheLock) {
                 // assign the edited data
                 mMetadata = new Bundle(mEditorMetadata);
+                if ((mArtwork != null) && (!mArtwork.equals(mEditorArtwork))) {
+                    mArtwork.recycle();
+                }
                 mArtwork = mEditorArtwork;
+                mEditorArtwork = null;
                 if (mMetadataChanged & mArtworkChanged) {
                     // send to remote control display if conditions are met
                     sendMetadataWithArtwork_syncCacheLock();