volume rocker: option to control cursor in text field using volume keys

Conflicts:
	res/values/ras_arrays.xml
	res/values/ras_strings.xml
	res/xml/system_settings.xml
volume rocker wake
volume rocker music control

Conflicts:
	res/values/ras_strings.xml
	src/com/android/settings/simpleaosp/VolumeRocker.java