Remove permissive from untrusted_app.

As an experiment, remove permissive from the untrusted_app
domain. This will allow us to create a test build, which
we can use for testing.

This change will be reverted very quickly.

Change-Id: I71eaf0f675fc7a3c5cc833f235792d0654e04318

untrusted_app.te

@@ -10,7 +10,6 @@
 ###
 
 type untrusted_app, domain;
-permissive untrusted_app;
 app_domain(untrusted_app)
 net_domain(untrusted_app)
 bluetooth_domain(untrusted_app)