Add runtime property permissions for experiments

Bug: 120794191
Bug: 123524494
Test: set a property and ensure it can be read in AndroidRuntime.cpp

Change-Id: Ib37102f35e9987d3d9baff83c45571a5d632ad50
diff --git a/private/system_server.te b/private/system_server.te
index 6fa2ae6..1893494 100644
--- a/private/system_server.te
+++ b/private/system_server.te
@@ -585,6 +585,7 @@
 set_prop(system_server, device_config_input_native_boot_prop)
 set_prop(system_server, device_config_netd_native_prop)
 set_prop(system_server, device_config_activity_manager_native_boot_prop)
+set_prop(system_server, device_config_runtime_prop)
 
 # BootReceiver to read ro.boot.bootreason
 get_prop(system_server, bootloader_boot_reason_prop)
@@ -947,6 +948,7 @@
   device_config_activity_manager_native_boot_prop
   device_config_input_native_boot_prop
   device_config_netd_native_prop
+  device_config_runtime_prop
 }:property_service set;
 
 # system_server should never be executing dex2oat. This is either