Add components/sync_user_events/OWNERS

The component was recently added in https://crrev.com/c/1583780 but I
failed to add an OWNERS file.

Bug: none
Change-Id: I97029414c605cbce6e21a1aefb819ed164e10759
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1599170
Auto-Submit: Marc Treib <treib@chromium.org>
Reviewed-by: Colin Blundell <blundell@chromium.org>
Commit-Queue: Colin Blundell <blundell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#657234}
1 file changed