Add built in resolution changer to android for speedup

[[Unknown]]

I'm guessing this makes little difference with the "non buffered rendering" speedhack disabled. Non buffered rendering always renders at the native resolution and ignores any render resolution setting.

On devices with high screen resolutions buffered rendering will probably give better performance, generally (it will also have less graphical issues, since you won't be disabling the game's ability to use buffers in its rendering.)

But yes, the non-buffered rendering speedhack could be improved to render at lower resolutions and upscale using a hardware scaler. There's an issue open on GitHub about this.

-[Unknown]