Add Kurt and Ethan as Layout owners

This change adds Kurt Catti-Schmidt and Ethan Jiminez
as owners in the Layout space as experts in the Grid area.

Change-Id: Ie7cd54cf6c9609fd273393401e6df98258a01fc4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5406318


Commit-Queue: Ian Kilpatrick <ikilpatrick@chromium.org>
Commit-Queue: Alison Maher <almaher@microsoft.com>
Reviewed-by: Ian Kilpatrick <ikilpatrick@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1279996}