Quiet Hours: Allow disabling phone ringer (3/3)

Change-Id: Ibb72266a233e44c932bdb10381a97e0ec82596c9
[2/3] Telephony: allow disabling non intrusive incall ui

Change-Id: I4eec37e8f9ec3a7e062b13deac54a844dc277a03

Conflicts:
	res/values/cm_strings.xml