问由于WebRTC观察者中的onTrack方法而导致的PeerConnection崩溃

EN

public interface Observer {
    @CalledByNative("Observer")
    void onSignalingChange(PeerConnection.SignalingState var1);

    @CalledByNative("Observer")
    void onIceConnectionChange(PeerConnection.IceConnectionState var1);

    @CalledByNative("Observer")
    void onIceConnectionReceivingChange(boolean var1);

    @CalledByNative("Observer")
    void onIceGatheringChange(PeerConnection.IceGatheringState var1);

    @CalledByNative("Observer")
    void onIceCandidate(IceCandidate var1);

    @CalledByNative("Observer")
    void onIceCandidatesRemoved(IceCandidate[] var1);

    @CalledByNative("Observer")
    void onAddStream(MediaStream var1);

    @CalledByNative("Observer")
    void onRemoveStream(MediaStream var1);

    @CalledByNative("Observer")
    void onDataChannel(DataChannel var1);

    @CalledByNative("Observer")
    void onRenegotiationNeeded();

    @CalledByNative("Observer")
    void onAddTrack(RtpReceiver var1, MediaStream[] var2);

    @CalledByNative("Observer")
    default void onTrack(RtpTransceiver transceiver) {
    }
}

private class Peer implements SdpObserver, PeerConnection.Observer {
     ...

     @Override
     public void onAddStream(MediaStream mediaStream) {}

     @Override
     public void onTrack(RtpTransceiver transceiver) {}    
}

compileOptions {
    sourceCompatibility JavaVersion.VERSION_1_8
    targetCompatibility JavaVersion.VERSION_1_8
}