hide System update settings preference screen
kill app long press back

Conflicts:
	res/values/ras_strings.xml
build tweaks header

Conflicts:
	res/values/ras_strings.xml
volume rocker: volume adjust sound preference

Conflicts:
	res/values/ras_strings.xml
volume rocker: allow volumes to be unlinked. make the volume overlay more functional
volume rocker: control cursor in text field using volume keys
volume rocker: wake. music control
Settings: Add Utility function
status bar: quick settings pulldown, left or right side option
status bar: brightness control
status bar: don't expose quick pull down on tablet
status bar: quick settings pulldown, use a simple list summary
volume rocker: make safe headset volume user configurable
navigation bar: custom height