add notification light customization.
original commit from CM (https://github.com/CyanogenMod/android_frameworks_base/commit/0b636d08439c291322339e02be605be54f589b91)

Conflicts:
	core/res/res/values/arrays.xml
	core/res/res/values/symbols.xml
	services/java/com/android/server/NotificationManagerService.java