Adds new policy for init_svc_debug_prop.

Used to restrict properties init.svc_debug_pid.*

Bug: 138114550
Test: getprop | grep init.svc_debug_pid  only shows results on root
Change-Id: I0c10699deec4c548a2463a934e96b897ddee1678
diff --git a/private/property_contexts b/private/property_contexts
index c31940c..254c55a 100644
--- a/private/property_contexts
+++ b/private/property_contexts
@@ -35,6 +35,7 @@
 debug.db.               u:object_r:debuggerd_prop:s0
 dumpstate.              u:object_r:dumpstate_prop:s0
 dumpstate.options       u:object_r:dumpstate_options_prop:s0
+init.svc_debug_pid.     u:object_r:init_svc_debug_prop:s0
 llk.                    u:object_r:llkd_prop:s0
 khungtask.              u:object_r:llkd_prop:s0
 ro.llk.                 u:object_r:llkd_prop:s0