GitLab

Record user action when an emoji is suggested to get timestamp.
This is to figure out if some users get emoji suggested in a short
timespan.

Bug: b/168692236
Change-Id: I5ceb7c3c1846b9cae5a3c44a0ccc0bf62b7cb756
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2434186
Commit-Queue: My Nguyen <myy@chromium.org>
Reviewed-by: Mark Pearson <mpearson@chromium.org>
Reviewed-by: Jing Wang <jiwan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#811494}