DO NOT MERGE Cherry-pick ICU-21448: Update Android ICU tzdata from 2020d
to 2020f. [R]

Cherry-pick ICU-21448: Update Android ICU tzdata
from 2020d to 2020f. [R]

This is a cherry pick of
https://github.com/unicode-org/icu/commit/25eb1510ec4e536fe0d0d1024b3ce71819510d0a.

New test cases in SimpleDateFormat.java and tzfmttst.cpp
were skipped as they rely on prod code changes. See
https://github.com/unicode-org/icu/pull/1526/files#r552372640
for more details.

Bug: 177201403
Test: CtsLibcoreTestCases
Test: CtsLibcoreOjTestCases
Test: CtsIcuTestCases
Test: CtsBionicTestCases
Test: CtsTextTestCases

Change-Id: Ic537360ec304c72468f558d7a5093a54a60d654f
(cherry picked from commit 16d49843c590ee549b60c2de879692b074f20f3e)
Merged-In: Ie7bf7b947715edc39da33eb76fbd849a71fc3c46