修复调音器音叉在页面关闭还能继续播放的问题

musictuner/src/main/java/com/cooleshow/musictuner/MusicTunerActivity.java

@@ -172,6 +172,7 @@ public class MusicTunerActivity extends BaseActivity<ActivityMusicTunerLayoutBin
         if (mMusicTunerHelper != null) {
             mMusicTunerHelper.release();
         }
+        AudioTrackManager.getInstance().stop();
     }
 
     @Override