GSI 12 alioth

This fixes audio distortion on GSI roms for alioth. Sets default renderer to Vulkan and increases Dalvik and dex2oat for smoother performance ( Since 128gb is smallest variant of this phone there's plenty of space to reserve 2GB for increased performance of apps , no reason to use default 500mb ).

Vanilla variant only without GMS (Playstore)

Idk the license agreement for it so I won't be sharing GMS variant, as far as I am aware vanilla one should be free to share as long as you provide source.If you want GMS variant it's not hard to make - use any linux distro , follow steps below to mount system.img , when mounted you can replace default build.prop from /system/build.prop with the one provided or modify build.prop yourself - explained more in README file.

Image and sources can be found here: https://developer.android.com/about/versions/12/gsi-release-notes