aaudio: fix assert after restart
E [ee43a9e0/bab] libvlc generic: AAudio stream error or disconnected:: AAUDIO_ERROR_DISCONNECTED
D [ee18feb0/bab] libvlc audio output: restart requested (7)
W onMoreData() data, stream disconnected
E processAudioBuffer(26): EVENT_MORE_DATA requested 8208 bytes but callback returned -1 bytes
E ../../modules/audio_output/android/aaudio.c:681: void Play(aout_stream_t *, vlc_frame_t *, vlc_tick_t): assertion "state == AAUDIO_STREAM_STATE_STARTING || state == AAUDIO_STREAM_STATE_STARTED" failed
Edited by Thomas Guillem