Revert "Add back notification light settings."

This reverts commit 97f8f9317504105e33065d794fb36158f8384d42.

Conflicts:
	AndroidManifest.xml
	res/values/cm_arrays.xml
	res/values/cm_strings.xml

Change-Id: I29df23e55b37c9efd75f30205c902b54da8e0303