Grant modem_diagnostic permission to radio_service

avc: denied  { find } for pid=10761 uid=10289 name=phone scontext=u:r:modem_diagnostic_app:s0:c512,c768 tcontext=u:object_r:radio_service:s0 tclass=service_manager permissive=0

Bug: 180467692
Change-Id: I43f664ecc327b98d761d62a6ee0f84aedba911da

diff --git a/vendor/google/modem_diagnostics.te b/vendor/google/modem_diagnostics.te
index 1077a40..d506496 100644
--- a/vendor/google/modem_diagnostics.te
+++ b/vendor/google/modem_diagnostics.te

@@ -5,6 +5,7 @@
 net_domain(modem_diagnostic_app)
 
 allow modem_diagnostic_app app_api_service:service_manager find;
+allow modem_diagnostic_app radio_service:service_manager find;
 allow modem_diagnostic_app surfaceflinger_service:service_manager find;
 
 userdebug_or_eng(`