The HID descriptor for the latest firmware always includes the share button, and GameInput will report it as always available, so double check against our list of classic Xbox One controllers and don't include the button on controllers that don't have it.
move SDL_UsingGameInputForXInputControllers() to core/windows/SDL_gameinput.cpp
because joystick/gdk/SDL_gameinputjoystick.cpp isn't always added to build.
This PR makes the GameInput joystick backend ignore non-gamepad controllers if DirectInput or XInput backends are enabled. This is done to prevent possible bugs and/or regressions.
This PR includes small improvements to the GameInput joystick backend:
- Device subtypes
- Compatibility with DirectInput joystick mappings (if the controller is not a gamepad, i.e. `GAMEINPUT_InternalIsGamepad()` returns `false`)
- Fallback to DirectInput/XInput for currently unsupported devices (force feedback ones and the ones that are neither gamepads nor controllers, I'm not sure if that's possible, but maybe racing wheels and other device subtypes would count?)
