New type for printk_formats, allow traced_probes.

Test: ls -lZ /sys/kernel/tracing/printk_formats
      [...] u:object_r:debugfs_tracing_printk_formats:s0 [...]

Test: setenforce 0;
      runcon u:r:system_server:s0 cat /sys/kernel/tracing/printk_formats
      logcat complains about /sys/kernel/tracing/printk_formats

Test: setenforce 0;
      runcon u:r:traced_probes:s0 cat /sys/kernel/tracing/printk_formats
      logcat does not complain about /sys/kernel/tracing/printk_formats

(need to setenforce 0, because otherwise the exec of ls is denied).

Bug: 70292203
Change-Id: I15ddef686f979c59daaba5263fa99aca3cd139e5
diff --git a/private/traced_probes.te b/private/traced_probes.te
index f010a77..c669eba 100644
--- a/private/traced_probes.te
+++ b/private/traced_probes.te
@@ -14,6 +14,7 @@
 allow traced_probes debugfs_tracing:dir r_dir_perms;
 allow traced_probes debugfs_tracing:file rw_file_perms;
 allow traced_probes debugfs_trace_marker:file getattr;
+allow traced_probes debugfs_tracing_printk_formats:file r_file_perms;
 
 # TODO(primiano): temporarily I/O tracing categories are still
 # userdebug only until we nail down the denylist/allowlist.