[2/7] telephony: Blacklist Support

Base: https://gerrit.omnirom.org/#/c/5668/
InCallUI: https://gerrit.omnirom.org/#/c/5669/
Mms: https://gerrit.omnirom.org/#/c/5671/
Settings: https://gerrit.omnirom.org/#/c/5011/
TelephonyProvider: https://gerrit.omnirom.org/#/c/5012/
Telephony: https://gerrit.omnirom.org/#/c/5010/

Change-Id: I4c46c8b5f2bca986e75b97aa522edef3c767778a