* Register 'media_player.firetv_adb_cmd' service
* Wrap the 'firetv_adb_cmd' service with 'adb_decorator'
* Address reviewer comments
* Move firetv to its own platform
* Move 'adb_command' service description
* Rename DOMAIN to FIRETV_DOMAIN
* Import KEYS in __init__ method
* Change 'self.KEYS' to 'self.keys'
* Update firetv in .coveragerc
* 'homeassistant.components.media_player.firetv' -> 'homeassistant.components.firetv'
* 'homeassistant.components.firetv' -> 'homeassistant.components.firetv.media_player'