[6/6] 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/

Change-Id: I546b497f6abf1f5f832c550438686d0fe60d0570