internal/gamepad: bug fix: wrong ID usages on Android
internal/gamepad: bug fix: wrong ID usages on Android

* IDs should have been decoded to a byte slice before checking the
  value.
* Ebitengine doesn't treat HID devices on Android so far, so checking
  whether the device was HID or not didn't make sense.

Updates #2309

hajimehoshi/ebiten,hajimehoshi/ebiten