[automerger skipped] DO NOT MERGE Update Android TZDB from 2020f to 2021a. [R] am: 72284a2aec -s ours

am skip reason: skipped by user mingaleev

Original change: https://googleplex-android-review.googlesource.com/c/platform/system/timezone/+/13447970

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I937ae7da3b58731e0cee524902965e44f288938e