implement noise suppression for phone calls (1/2)

Change-Id: If51532bd8220fab8722bbb594f70515f9d74b49b
Phone: Sprint MWI Quirk: Phantom message wait indicator workaround (2/2)

Part (1/2) http://review.cyanogenmod.com/#/c/13706/

Change-Id: Iec65915475e6b8224b82feec5571f7bbded0545a