Revert "Remove accidental early return"

Revert "Add CTS for not revoking permissions that have changed r..."

Revert submission 17969235-b/205642821

Reason for revert: b/233753192
Reverted Changes:
Ie03981bde:Add CTS test for permission event cleanup job
Ie9bbc7d03:Move PermissionEvent classes out of v33
I544934ec9:Remove accidental early return
I7866a1209:Do not auto-revoke if permission changed recently
I86ece4a22:Add CTS for not revoking permissions that have cha...

Change-Id: I00dd9cddb52b639bbe0f1ee741a7d636a4db639e