Add event log tag for hidden API access logging.

This new event is logged by ART when hidden API accesses are detected.

Test: m
Test: $ adb lolcat -b events
Bug: 64382372
Bug: 77517571
Merged-In: I5ebb1424d83686dade0d34b118944b0c4c0c7bb1
Change-Id: I5ebb1424d83686dade0d34b118944b0c4c0c7bb1
(cherry picked from commit 8ec1c7ea7c014d83466b51748a565bddf6af5b48)
diff --git a/logcat/event.logtags b/logcat/event.logtags
index 7c40a77..750761f 100644
--- a/logcat/event.logtags
+++ b/logcat/event.logtags
@@ -67,8 +67,9 @@
 # ZygoteInit class preloading ends:
 3030 boot_progress_preload_end (time|2|3)
 
-# Dalvik VM
+# Dalvik VM / ART
 20003 dvm_lock_sample (process|3),(main|1|5),(thread|3),(time|1|3),(file|3),(line|1|5),(ownerfile|3),(ownerline|1|5),(sample_percent|1|6)
+20004 art_hidden_api_access (access_method|1),(flags|1),(class|3),(member|3),(type_signature|3)
 
 75000 sqlite_mem_alarm_current (current|1|2)
 75001 sqlite_mem_alarm_max (max|1|2)