webrtc native 声音控制

再次吐槽文档匮乏。

有个方法可以控制

public void onAddStream(MediaStream stream) {
	...
	stream.audioTracks.get(0).setVolume(mVolume);
}

参考资料：
https://chromium.googlesource.com/external/webrtc/+/lkgr/sdk/android/api/org/webrtc/AudioTrack.java

/** Sets the volume for the underlying MediaSource. Volume is a gain value in the range
 *  0 to 10.
 */
public void setVolume(double volume) {
  nativeSetVolume(getNativeAudioTrack(), volume);
}