avoid fallback to AudioTrack in androidaudioplugin-manager

[atsushieno]

It is consolidated from #199: something in aap::PluginPlayer (in androidaudioplugin-manager.aar) seems to prevent low latency AAudio callback once the player is paused and resumed. Copypasting Perfetto screenshot from the issue:

There were two "playing" states within the profiling. The first with AAudio, the second with AudioTrack. The latter should not happen.

Interestingly, there was no warnings when falling back to AudioTrack on adb log.