updater_app: Allow updater_app domain to access the network

When the Updater app was switched from the priv_app selinux domain
to its own domain it accidentally lost network permissions.

Change-Id: Ieafcf0ae8fb67b3eea6f652326fe232149e159d4
diff --git a/common/private/updater_app.te b/common/private/updater_app.te
index ad42ccc..8c0bbe5 100644
--- a/common/private/updater_app.te
+++ b/common/private/updater_app.te
@@ -1,6 +1,7 @@
 type updater_app, domain, coredomain;
 
 app_domain(updater_app)
+net_domain(updater_app)
 
 binder_call(updater_app, update_engine)