Revert "Revert "Use Apex sepolicy if it's available""

This reverts commit 5638fcc22bc6d5e31a3e0a7fcf436c8379b1ae48.

Reason for revert: Root cause of b/217252559 fixed.

Change-Id: I8d2fbf0cab23a56dbea1f422608097c48d9288c0
4 files changed