allow radio to find cameraserver_service for video calls

Addresses:
avc: denied  { find } for service=media.camera pid=1589 uid=1001 scontext=u:r:radio:s0 tcontext=u:object_r:cameraserver_service:s0 tclass=service_manager permissive=0

Bug: 29190415
Change-Id: I77c0337500b8ab2f5d7d3d5982c7416fc39b1522

radio.te

@@ -28,6 +28,7 @@ auditallow radio system_radio_prop:property_service set;
 set_prop(radio, ctl_rildaemon_prop)
 
 allow radio audioserver_service:service_manager find;
+allow radio cameraserver_service:service_manager find;
 allow radio drmserver_service:service_manager find;
 allow radio mediaserver_service:service_manager find;
 allow radio radio_service:service_manager { add find };