add notification light customization.
original commit from CM (https://github.com/CyanogenMod/android_packages_apps_Settings/commit/28413bb813a4b621f6575b85ef04ce7636490f92#diff-3)

Fix build?

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