- Remove unused button2 variable
- Remake little-used backend joystick reset function as function pointer
- Allow soft reset and self-test on Android (although there is still a race condition due to code that directly sets
joy_button[12] values
- Breaking changes currently only tested on Linux desktop build =P
- Goal is to eventually eliminate most/many of the disparate getter/setter functions to allow better
modularity/scaling and platform portability
