phone: Enable the blacklist by default

Change-Id: I0b2d3482d75abe9c9fc161f199782f27b9baa46b
phone: Set default preference values for blacklist option

Change-Id: Iac33c84e19f30dd78226989977af90891d65018a
Merge remote-tracking branch 'cm/cm-10.1'; commit 'HEAD' into HEAD