[Tether15] Allow system app to find TetheringManager

Bug: 144320246
Test: -build, flash, boot
      -OFF/ON hotspot

Change-Id: I8ce7ac5eb8198f0df4a2da426e3c56e8915e746a
diff --git a/private/priv_app.te b/private/priv_app.te
index a9e9980..c776907 100644
--- a/private/priv_app.te
+++ b/private/priv_app.te
@@ -52,6 +52,7 @@
 allow priv_app radio_service:service_manager find;
 allow priv_app recovery_service:service_manager find;
 allow priv_app stats_service:service_manager find;
+allow priv_app tethering_service:service_manager find;
 
 # Allow privileged apps to interact with gpuservice
 binder_call(priv_app, gpuservice)