Settings: Add Utility function

Conflicts:
	src/com/android/settings/Utils.java

Change-Id: Iefcea8026627c41ce5fa5b7d1887811df1611868
Status bar brightness control

Conflicts:
	res/values/ras_strings.xml
	res/xml/status_bar_settings.xml
	src/com/android/settings/rascarlo/StatusBarSettings.java

Change-Id: I3e4539e9c5582dffa5353e64915e6640211c74e1