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 25e686d3cf555b99993e8a5c7edb2375171e5392)