[Wear] Remove title and subtitle when receiving media stopped event.

Author: Chris Bellew

wear/src/main/java/com/atomjack/wear/WearListenerService.java

@@ -101,11 +101,15 @@ public void onMessageReceived(MessageEvent messageEvent) {
         intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
         startActivity(intent);
       } else if(message.equals(WearConstants.MEDIA_STOPPED)) {
+        nowPlayingMedia = new DataMap();
         mNotifyMgr.cancel(NOTIFICATION_ID);
       } else if(message.equals(WearConstants.MEDIA_PLAYING) || message.equals(WearConstants.MEDIA_PAUSED)) {
         if(dataMap.getBoolean(WearConstants.LAUNCHED, false)) {
           finishMain();
         }
+        // First, remove previous title and subtitle, if there are any
+        nowPlayingMedia.remove(WearConstants.MEDIA_TITLE);
+        nowPlayingMedia.remove(WearConstants.MEDIA_SUBTITLE);
         nowPlayingMedia = WearApplication.getInstance().nowPlayingMedia;
         nowPlayingMedia.putAll(dataMap);
         nowPlayingMedia.putString(WearConstants.PLAYBACK_STATE, message.equals(WearConstants.MEDIA_PLAYING) ? PlayerState.PLAYING.name() : PlayerState.PAUSED.name());