Policy for property_service_for_system socket

Bug: 262237198
Test: Run POC in one shell, set properties as root and system in another
Ignore-AOSP-First: Security fix
Change-Id: I37f3344caadf7f17f4d0caaca5870047ce88a5ad
diff --git a/private/file_contexts b/private/file_contexts
index 632e069..f87a77f 100644
--- a/private/file_contexts
+++ b/private/file_contexts
@@ -151,6 +151,7 @@
 /dev/socket/pdx/system/vr/display/vsync	u:object_r:pdx_display_vsync_endpoint_socket:s0
 /dev/socket/prng_seeder	u:object_r:prng_seeder_socket:s0
 /dev/socket/property_service	u:object_r:property_socket:s0
+/dev/socket/property_service_for_system  u:object_r:property_socket:s0
 /dev/socket/racoon	u:object_r:racoon_socket:s0
 /dev/socket/recovery    u:object_r:recovery_socket:s0
 /dev/socket/rild	u:object_r:rild_socket:s0