GitLab

Replace the current language detect API with the FindLanguage API from
text classifier.

This is the first change of the Translation backend for the Quick
Answers.

Bug: b/150034512
Test: Manual Test
Change-Id: Ie0a53e473b8a378c2692952f350f37b3b2534894
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2377582
Commit-Queue: Yue Li <updowndota@chromium.org>
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#806902}