Add system_file_type

This file resides on /system, so must be annotated with the
system_file_type attribute.

Test: Policy compiles.
Change-Id: I4aeacf4033a84ef0b088ae6c92f9531bbbf991b6
diff --git a/car_product/sepolicy/test/powertestservice.te b/car_product/sepolicy/test/powertestservice.te
index 2e2ace7..2d7d48e 100644
--- a/car_product/sepolicy/test/powertestservice.te
+++ b/car_product/sepolicy/test/powertestservice.te
@@ -1,5 +1,5 @@
 type powertestservice, domain, coredomain;
-type powertestservice_exec, exec_type, file_type;
+type powertestservice_exec, exec_type, file_type, system_file_type;
 
 init_daemon_domain(powertestservice)