Telephony: implement noise suppression for phone calls (2/2)

Forward port from cm-10.2

Conflicts:
	res/values/slim_strings.xml
	src/com/android/phone/CallFeaturesSetting.java

Change-Id: Ie72449f952f99b410fbb5bc4a8e6cbc833e6176f
Merge "Telephony: implement noise suppression for phone calls (2/2)" into kk4.4