The fix need to be cherrypick from ICU.
Fix in https://github.com/unicode-org/icu/pull/286
Adds regression test for 8469.

Bug: v8:8469
Change-Id: If173058dd1113782fcf2ff5a55f962721f46aba5
Reviewed-on: https://chromium-review.googlesource.com/c/1340733Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Frank Tang <ftang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#58032}