NetherSX2 valpha-1059 Requires Android 8.0 and up.

* Bug fixes for Mali GPUs in both Vulkan and OpenGL renderers (tested with Pixel 6).
* Texture preloading performance improvements.
* Add memory card creation/settings/per-game overrides.
* Disable texture barriers by default on Adreno (too many broken drivers).
* Prevent Vulkan being used on old drivers which are missing required formats.
* Minor optimization to VU dispatch (~10% improvement in Ratchet).
* Fix error reporting when loading incompatible save state.
* Add save state manager.