Phone: implement noise suppression for phone calls

https://github.com/AOKP/frameworks_base/commit/44b1a41cba0dfdff79cba28c1a6a9ee4ab72f694

Patch-set 3: This should work
Patch-set 4: Default value set to false
Patch-set 5: Cleanup

Change-Id: Ie72449f952f99b410fbb5bc4a8e6cbc833e6176f

Conflicts:

	res/values/strings.xml
	src/com/android/phone/CallFeaturesSetting.java
	src/com/android/phone/PhoneUtils.java