确保静音音频track不影响后续添加的正常音频track

src/Common/MediaSink.cpp

@@ -46,6 +46,8 @@ bool MediaSink::addTrack(const Track::Ptr &track_in) {
     //克隆Track，只拷贝其数据，不拷贝其数据转发关系
     auto track = track_in->clone();
     auto track_type = track->getTrackType();
+    //确保添加非静音音频track时，取消之前的静音音频track
+    _mute_audio_maker = nullptr;
     _track_map[track_type] = track;
     _track_ready_callback[track_type] = [this, track]() {
         onTrackReady(track);