ThermalService: add event log when temperature changed

Bug: 138790571
Bug: 126562025
Test: Use emul_temp to test event log
Change-Id: I4271d226f106cfd61960f858429de8042fb5a7c8
diff --git a/services/core/java/com/android/server/EventLogTags.logtags b/services/core/java/com/android/server/EventLogTags.logtags
index 4d39f9a..bec08f4 100644
--- a/services/core/java/com/android/server/EventLogTags.logtags
+++ b/services/core/java/com/android/server/EventLogTags.logtags
@@ -39,6 +39,12 @@
 27391 user_activity_timeout_override (override|2|3)
 27392 battery_saver_setting (threshold|1)
 
+
+# ---------------------------
+# ThermalManagerService.java
+# ---------------------------
+2737 thermal_changed (name|3),(type|1|5),(temperature|5),(sensor_status|1|5),(previous_system_status|1|5)
+
 #
 # Leave IDs through 2740 for more power logs (2730 used by battery_discharge above)
 #