Add jityao@google.com as OWNER to /c/b/chromeos/extensions/login_screen

Bug: none
Change-Id: Ic68454edd22d927a9e01df04d2cbdd932567cec3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1949475
Auto-Submit: Alexander Hendrich <hendrich@chromium.org>
Commit-Queue: Zakhar Voit <voit@google.com>
Reviewed-by: Zakhar Voit <voit@google.com>
Cr-Commit-Position: refs/heads/master@{#721434}

chrome/browser/chromeos/extensions/login_screen/OWNERS

 hendrich@chromium.org
+jityao@google.com
 voit@google.com