Granting remote_prov_app find for tethering

The connectivity service manager gets a reference to the tethering
service in its constructor. This causes SELinux denials when the
RemoteProvisioner app attempts to use the connectivity service manager
to figure out when a network is available in order to provision keys.

Test: No SELinux denials!
Change-Id: Icbd776a9b81ee9bb22a2ac6041198fe0a6d3a0d0
diff --git a/private/remote_prov_app.te b/private/remote_prov_app.te
index e877981..34bbadc 100644
--- a/private/remote_prov_app.te
+++ b/private/remote_prov_app.te
@@ -7,4 +7,5 @@
 allow remote_prov_app {
     activity_service
     remoteprovisioning_service
+    tethering_service
 }:service_manager find;