Snes9x EX

What's New:

- Fix a thread issue that could cause dropped frames and slow fast-forward performance
- Reduce input lag in cases where input occurs just after vsync
- Add "CPU Affinity Mode" option, on devices with different types of CPU cores (ARM big.little, etc.) this defaults to using only the performance cores during emulation for more consistent frame times
- Add support for themed icons on Android 13
- Fix issues related to file extensions on Android 13 for front ends