Enable performanced to talk to the permission service.

Performanced needs to talk to the permission service to verify
permissions of clients to access certain restricted scheduler
policies.

Bug: 64337476
Test: performance_service_tests passes; logs do not contain avc
      denials for performanced -> permission service.

Change-Id: I31618ab1d3e79c3c10138d567b0f5606527020f9

public/performanced.te

@@ -2,6 +2,11 @@
 type performanced, domain, mlstrustedsubject;
 type performanced_exec, exec_type, file_type;
 
+# Needed to check for app permissions.
+binder_use(performanced)
+binder_call(performanced, system_server)
+allow performanced permission_service:service_manager find;
+
 pdx_server(performanced, performance_client)
 
 # TODO: use file caps to obtain sys_nice instead of setuid / setgid.