Add more tzlookup.xml time zone metadata

This commit adds support for metadata to tell when a time
zone (effectively) becomes unused.

There are numerous cases where the number of distinct
time zones needed to represent all local times in a country/
region drops over time. For example, since 1970 the number
of zones required in the US has dropped to 8 from 29.

This commit just adds support for the information. Later
commits can make use of it and populate the data.

Bug: 72142943
Test: CTS: run cts -m CtsLibcoreTestCases
Merged-In: I74623859a7d7cb55daa1e767e88c11da48915b0b
Change-Id: I74623859a7d7cb55daa1e767e88c11da48915b0b
(cherry picked from commit f2d1ccb4)