Add LED configuration support from mr0/10.0

Change-Id: I36cee9cc813bd0fc62c30c6e10c61bcd9a131bf6
(cherry picked from commit 28413bb813a4b621f6575b85ef04ce7636490f92)

Conflicts:
	AndroidManifest.xml
	res/values/arrays.xml
	res/values/dimens.xml
	res/values/strings.xml
	res/xml/display_settings.xml
	src/com/android/settings/DisplaySettings.java