Finalize package intents used to trigger tz update

Finalize the package intents used to trigger tz update and
improve the documentation.

Bug: 64018084
Test: PTS: run pts -m PtsTimeZoneTestCases
Change-Id: Ifba9dea1d6d8818f875d4c7efba09d77c8e6d66a
Merged-In: Ifba9dea1d6d8818f875d4c7efba09d77c8e6d66a
(cherry picked from commit 228dc6cfefd06936657fa39848f7ee73162def8f)
1 file changed