[3/7] InCallUI: Blacklist support

Base: https://gerrit.omnirom.org/#/c/5668/
telephony: https://gerrit.omnirom.org/#/c/6347/
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: I38e3f38ec4a773485c065d258e1ab5d40b9ddd53