Update Android to tzdb 2020a [Q branch]

This change is associated with tzdb 2020a changes in system/timezone.

This change was generated using the CLDR patch from
https://unicode-org.atlassian.net/browse/CLDR-13739

It was compared with the ICU patch from
https://unicode-org.atlassian.net/browse/ICU-21094

Bug: 155047654
Test: ICU4C host tests (no new breakages)
Test: ICU4J host tests (no breakages)
Test: See associated system/timezone change
Merged-In: I7102ef8296d3e11723c64e37f845f611e7ea47df
Change-Id: I7102ef8296d3e11723c64e37f845f611e7ea47df
(cherry picked from commit a3cdb6f78de45d071f93e8189e352d31a0138b24)
(cherry picked from commit 0564416cf66e6b609880e7a608b9190939899aa6)
6 files changed