Logs from #25302 (closed) expose this annoying warning:
12-13 19:53:18.042 W/AudioTrack( 3934): Use of stream types is deprecated for operations other than volume control 12-13 19:53:18.042 W/AudioTrack( 3934): See the documentation of AudioTrack() for what to use instead with android.media.AudioAttributes to qualify your playback use case
Poked around a bit and found this on the Android developer site. It looks like vlc-android is already handling audio focus correctly, but it would be nice to banish the extra log entry on devices running Android API 26+.
Please note this is untested which is why I am marking it as Draft. Is there an emulator in the SDK I can use to test it?