g3: increase ui responsiveness

* lower touchslop, improves scroll response
* speed up the notification shade

Change-Id: Ibc77ab230e28e289deb3684c094f8ddf2598cb65
g3: Fade the screen off by default

 * The bright LCD backlight on this device makes the electron beam
   look terrible as the LCD does not fade off with the beam.

Change-Id: I2de09740970a82e26216e8deb1886b89ca42dbb0
g3: enable eject sdcard

Change-Id: I3e044595b25f40bc3bd911b50bbbea84e51549da
g3: update props

* remove composition prop
* enable 24bit offload audio

Change-Id: If9591876fe21b803fbd71dbde438936d4107d3a3