RESTRICT AUTOMERGE: Always use safe labels

For display purposes, we should always be using safe labels. This
prevents excessively long labels from preventing app uninstallation.

Bug: 62537081
Test: Manual. Install APK from bug and see that it can be uninstalled
Change-Id: Ic0e0d47f5ff76e4a73b30988d0a024fb3ee651ae
(cherry picked from commit eaa4e6ec82f32d66c053ccc4cb67df1e52d1711b)