drivers: usb: Use Android device as USB keyboard/mouse [pelya]

- 03 September 2014 ported for Samsung Galaxy Tab S SM-705 LTE by UpInTheAir@XDA

Base project: https://github.com/pelya/android-keyboard-gadget
Required app: https://play.google.com/store/apps/details?id=remote.hid.keyboard.client

Steps:
* Start ADB Debugging
* Start app
* Connect device to system via USB cable