Add ATV KeyHandler

* Add a keyhandler to support Netflix, Youtube, Google Play,
  HBO Max, Disney+, and Settings buttons on dopinder, sabrina,
  wade.

* Use keycode instead of scancode, as dopinder/sabrina have
  overlapping scancodes's for their buttons.

Co-authored-by: Aaron Kling <webgeek1234@gmail.com>

Change-Id: If4e227d03684bf62e19ee8ca10b699ff27827529