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

Forward port from cm-10.2

Change-Id: Ie72449f952f99b410fbb5bc4a8e6cbc833e6176f
Merge "Telephony: implement noise suppression for phone calls (2/2)" into cm-11.0
Merge remote-tracking branch 'cyanogen/cm-11.0' into cm-11.0

Conflicts:
	res/values/cm_strings.xml