Ensure location permission re-granted on re-bind to system dialer.

Fix issue where a crash in the system dialer does not result in the
location permission being re-granted to the system dialer upon rebind.

Test: Added unit test to verify that permission is re-granted on rebind
to the system dialer.
Fixes: 152327401

Change-Id: Iaddb0f946b4db073a0d6e2a4f32d96f4eca79b0a