Follow up cl for the change of CanonicalizeLocaleList in
https://tc39.github.io/proposal-intl-locale/#sec-canonicalizelocalelist

Bug: v8:8655
Change-Id: I2505057e03511806320104974519fd4b97848b53
Reviewed-on: https://chromium-review.googlesource.com/c/1423323Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Frank Tang <ftang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59014}