[automerger skipped] DO NOT MERGE Update Android TZDB from 2021a1 to 2021a3. [R] am: d2ea2dccef -s ours am: 600a1ab463 -s ours am: 13ea6ed671 -s ours

am skip reason: subject contains skip directive

Original change: https://googleplex-android-review.googlesource.com/c/platform/system/timezone/+/16238878

Change-Id: Idd6ef3b59ebdf0e4a10391deb2ff4fce100d90a3