NetherSX2 valpha-996 Requires Android 8.0 and up.

* Add controller mapping and hotkeys. Combo buttons/chords are supported.
* Expose more GS options.
* Support trilinear filtering and software blending in Vulkan renderer. If you have rendering glitches, disable texture barriers in Advanced Settings.
* Fix issues when combining texture preloading and GPU palette textures.
* Non-DSB path for Vulkan renderer.
* Add aspect ratio and software renderer FMV switch.
* Fix const prop bug in recompiler (affected Juiced 2).