allow system server to search into /metadata/aconfig dir

Bug: b/312459182
Test: m
Change-Id: I44a2113b53b23a47d30460d0e7120bbeceb3ecbf
diff --git a/private/system_server.te b/private/system_server.te
index 886499e..c2c30ae 100644
--- a/private/system_server.te
+++ b/private/system_server.te
@@ -1470,6 +1470,7 @@
 
 allow system_server aconfig_storage_flags_metadata_file:dir rw_dir_perms;
 allow system_server aconfig_storage_flags_metadata_file:file create_file_perms;
+allow system_server aconfig_storage_metadata_file:dir search;
 
 allow system_server repair_mode_metadata_file:dir rw_dir_perms;
 allow system_server repair_mode_metadata_file:file create_file_perms;