OpenAL 3D Audio

[ThreeDeeJay]

OpenAL Soft now also builds the library for Android https://github.com/kcat/openal-soft/actions
I was able to build the library myself a while ago and replace the one in this app using root, but obviously most phones aren't rooted so it would be nice to add an option to enable HRTF (3D audio effect) in the audio options, just like there's one for EAX (which is just for environmental reverb).

I think the option just needs to set ALC_HRTF_SOFT = 2 for HRTF on, or 1 for off, and of course update the current library to the latest OpenAL Soft if it's not done already.