su: don't auditallow service_manager for su

Addresses the following auditallow messages:

  avc: granted { find } for service=accessibility scontext=u:r:su:s0 tcontext=u:object_r:accessibility_service:s0 tclass=service_manager
  avc: granted { find } for service=activity scontext=u:r:su:s0 tcontext=u:object_r:activity_service:s0 tclass=service_manager
  avc: granted { find } for service=package scontext=u:r:su:s0 tcontext=u:object_r:package_service:s0 tclass=service_manager
  avc: granted { find } for service=user scontext=u:r:su:s0 tcontext=u:object_r:user_service:s0 tclass=service_manager
  avc: granted { find } for service=window scontext=u:r:su:s0 tcontext=u:object_r:window_service:s0 tclass=service_manager

Change-Id: Ie58ad3347e9ef1aacd39670cfec7d095875e237b

su.te

@@ -49,4 +49,5 @@ userdebug_or_eng(`
   dontaudit su keystore:keystore_key *;
   dontaudit su domain:debuggerd *;
   dontaudit su domain:drmservice *;
+  service_manager_local_audit_domain(su)
 ')