SimpleManualPermissionEnforcementDetector: conditional ERROR level incident

Use the new information available in @PermissionMethod to raise an
ERROR level incident if we are confident that migrating to
@EnforcePermission is not behavior changing:
 - the called PermissionMethod returns void, indicating it *enforces*
   that PackageManager.PERMISSION_GRANTED is true
 - the called PermissionMethod is annotated orSelf = true, meaning it
   passes of the calling process OR the current process has the
   permission

Bug: 232058525
Test: SimpleManualPermissionEnforcementDetectorTest
Change-Id: Ic4be3d06d6b6446ee81560a6eda7bf9249db1f4c