/** On destruction of ActivitiesEngine stop the timeline event watcher. */
 @Override
 public void onDestroy() {
   mTimelineEventWatcher.stopWatching();
   if (isContactSyncReady()) {
     EngineManager.getInstance().getLoginEngine().removeListener(this);
   }
 }
 /**
  * onCreate. Instruct the timeline event watcher to start watching for native events the
  * Activities engine may need to handle (call and message events).
  */
 @Override
 public void onCreate() {
   mTimelineEventWatcher.startWatching();
 }