sepolicy: export SuspendProperties.short_suspend_threshold_millis

Bug: 182546466
Test: Test with getprop code outside system img
Change-Id: I4817c22ecc0a143ea818e0850fb721cbdf1d5ae5
Signed-off-by: Denny cy Lee <dennycylee@google.com>
diff --git a/private/compat/30.0/30.0.cil b/private/compat/30.0/30.0.cil
index 9dff2c6..73374e6 100644
--- a/private/compat/30.0/30.0.cil
+++ b/private/compat/30.0/30.0.cil
@@ -1300,6 +1300,7 @@
 (typeattributeset default_prop_30_0 (
     default_prop
     build_config_prop
+    suspend_prop
     init_service_status_private_prop
     setupwizard_prop
     sqlite_log_prop