Allow system_server to read binderfs state file

This is for more information on binder threads during ANRs.

Test: adb shell am hang
Bug: 316970771
Change-Id: I905c8b605540aabb7463cb0e1b3a9a8b07f8d5cb
diff --git a/private/system_server.te b/private/system_server.te
index 7306773..5da6f66 100644
--- a/private/system_server.te
+++ b/private/system_server.te
@@ -1596,6 +1596,8 @@
 # Allow system server to read binderfs
 allow system_server binderfs_logs:dir r_dir_perms;
 allow system_server binderfs_logs_stats:file r_file_perms;
+# For ANRs
+allow system_server binderfs_logs_transactions:file r_file_perms;
 
 # Allow GameManagerService to read and write persist.graphics.game_default_frame_rate.enabled
 set_prop(system_server, game_manager_config_prop)