commit 162aba9ce5fe9ad418393143269b05e7256aaae7
author Neil Fuller <nfuller@google.com> Thu Jul 16 17:54:38 2020 +0100
committer Neil Fuller <nfuller@google.com> Fri Jul 17 15:06:37 2020 +0100
tree 43a44884b00afffe7aeb8c3f0f798816d5ec3a63
parent 7f93807e6a87e4e2eed626443f61d06ba47b5184

Provide access to new "alts" data in tzlookup.xml

Provide access to new alternative IDs (alts=) data in tzlookup.xml and
add tests.

There are various synonyms in IANA data and occasionally zone IDs are
obsoleted in favor of new ones that are functionally identical.

The alternative IDs in tzlookup.xml provide the information needed to
determine region even if alernative zone IDs are provided than those
that Android uses by default.

Bug: 155738410
Test: atest com.android.i18n.test.timezone (ZoneInfoDbTest fails, but
      atest / permission issue?)
Test: run cts -m CtsIcuTestCases -t com.android.i18n.test.timezone.ZoneInfoDbTest
Change-Id: I9ee8283bc6cdbe81b5961a5945dc33cfdfa51e3c