Contacts: Add support for Blacklist

Requires http://review.cyanogenmod.org/#/c/34904/

Change-Id: Ibc07f5749b7adcc08f106012ba22ae866d004921
Merge "Contacts: Add support for Blacklist" into cm-10.1
Contacts: merge CyanogenMod

Change-Id: Ic40a5293e0504dceed369da48ad1e48254b51c51