DO NOT MERGE Update Android ICU tzdata from 2021a to 2021a1. [S-V2]

This change is associated with tzdb 2021a rev. 2 changes in
system/timezone.

Please keep in mind that ICU's reported version will be 2021a, not
2021a1 even though technically it is 2021a1.

Test file updates are picked from
https://github.com/unicode-org/icu/pull/1885/commits/bbb2084853c3dfaa54c89730c3f8235be62277bc.

zoneinfo64.txt and binary files are generated as part of running
system/timezone/update-tzdata.py

Bug: 201762557
Test: see tests in system/timezone CL
Change-Id: I0d2b0b1a64a59721f845a63500801abfd96daca3
Merged-In: I0d2b0b1a64a59721f845a63500801abfd96daca3
3 files changed