Allow system_server to control the artd_pre_reboot service.

Bug: 356858364
Test: adb shell pm art pr-dexopt-job --run
Change-Id: Id5e557575a85b2ca753de894ff739d1ed2e188bf
diff --git a/private/property_contexts b/private/property_contexts
index f631f8f..fb36be4 100644
--- a/private/property_contexts
+++ b/private/property_contexts
@@ -202,6 +202,11 @@
 ctl.stop$snapuserd      u:object_r:ctl_snapuserd_prop:s0
 ctl.restart$snapuserd   u:object_r:ctl_snapuserd_prop:s0
 
+# Restrict access to starting/stopping artd_pre_reboot.
+ctl.start$artd_pre_reboot          u:object_r:ctl_artd_pre_reboot_prop:s0
+ctl.stop$artd_pre_reboot           u:object_r:ctl_artd_pre_reboot_prop:s0
+ctl.restart$artd_pre_reboot        u:object_r:ctl_artd_pre_reboot_prop:s0
+
 # NFC properties
 nfc.                    u:object_r:nfc_prop:s0