Samsung Pro Audio used to be the only low-latency audio API on Android devices. AFAIK it was a very thin wrapper over JACK. Of course, using it often crashed the app, and then Samsung first declared it deprecated and then didn't port it to 64-bit runtime.
Is AAudio really low latency, or "low latency" in the same sense as low latency modes in Android Audio and OpenSL ES? It's surprisingly difficult to find actual numbers that would compare between these three.
It could have been removed too because app developers didn't use it, because they couldn't make it stable or because they couldn't make it work together with mic permissions.
Anyway, I'm interested in numbers, and specifically whether switching from Android Audio or OpenSL to AAudio brings any significant improvement.
It's a name that's sometimes used for AudioTrack, AudioRecord and related classes under android.media. Does that collection have an official name? I would also suggest that you learn some manners.