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

Conflicts:
	res/values/ras_strings.xml
[2/3] services_telephony: National Data Roaming

Credits: CyanogenMod

Linked commits:
        frameworks/base: https://gerrit.paranoidandroid.co/#/c/3654/
        opt/Telephony: https://gerrit.paranoidandroid.co/#/c/3655/

Conflicts:
	res/values/ras_strings.xml