Phone: Add Ring Delay feature (port forward) - AOKP

This allows the user to set the number of seconds
before the ringer goes off. This is useful when
vibrate is enabled to get "vibrate before ring".

Change-Id: If9e72333cc5ce8203bc764e918ad8082312dccb7

Conflicts:
	src/com/android/phone/CallFeaturesSetting.java
	src/com/android/phone/Ringer.java