Logging improvements for time zone updates

Logging improvements for time zone updates:
1) Add EventLog entries time zone update service interactions.
2) Add more information to dumpsys logs to improve debugging.

Unit tests run with:

make -j30 FrameworksServicesTests
adb install -r -g \
  "out/target/product/angler/data/app/FrameworksServicesTests/FrameworksServicesTests.apk"
adb shell am instrument -e package com.android.server.timezone -w \
  com.android.frameworks.servicestests \
  "com.android.frameworks.servicestests/android.support.test.runner.AndroidJUnitRunner"

Bug: 31008728
Test: See above for unit testing.
Test: Internal xTS tests
Test: adb shell dumpsys timezone
Test: adb logcat -b events -v threadtime -v printable -v uid -d *:v
Change-Id: I9356f4694e60b49e4b06aadd632d1bad517b8a29
(cherry picked from commit d857f676744af55c79c4871c881bf9598f6b21e9)
diff --git a/services/core/java/com/android/server/EventLogTags.logtags b/services/core/java/com/android/server/EventLogTags.logtags
index 68f8c1b..b516a91 100644
--- a/services/core/java/com/android/server/EventLogTags.logtags
+++ b/services/core/java/com/android/server/EventLogTags.logtags
@@ -268,3 +268,16 @@
 # GestureLauncherService.java
 # ---------------------------
 40100 camera_gesture_triggered (gesture_on_time|2|3), (sensor1_on_time|2|3), (sensor2_on_time|2|3), (event_extra|1|1)
+
+# ---------------------------
+# timezone/RulesManagerService.java
+# ---------------------------
+51600 timezone_trigger_check (token|3)
+51610 timezone_request_install (token|3)
+51611 timezone_install_started (token|3)
+51612 timezone_install_complete (token|3), (result|1)
+51620 timezone_request_uninstall (token|3)
+51621 timezone_uninstall_started (token|3)
+51622 timezone_uninstall_complete (token|3), (result|1)
+51630 timezone_request_nothing (token|3)
+51631 timezone_nothing_complete (token|3)