Improve fake controller detection/rejection

[binarycounter]

Fixes gptk's Xbox mode.

• Changes device version similar to PR 8 (Fix Inverted D-pad on Some Unity Games by Specifying Xbox 360 Gamepad Version. #8) to fix D-Pad mapping issues
• Adds BUS_USB bustype because some apps check for this to detect real/virtual controllers
• Fixes axis order, shouldn't matter in theory, but fixes Joystick API mapping for an unknown reason.
• Adds a new method for detecting and rejecting our own fake controller. Instead of relying on the device name reported by SDL, we now compare newly added controller to a list of existing controllers added on init. This ensures we ALWAYS detect the fake controller and other (real) Xbox controllers do not get falsely detected.

Tests:
https://docs.google.com/spreadsheets/d/1Kile6xRmJtdSbMaupQgW_iWjoHTZqy0d9_7P_V_f5VU/edit?gid=1043468637#gid=1043468637