Add //ash/components/OWNERS

Bug: none
Change-Id: Ic9332c8795cbb58c7347aa4b719c62aa5d2c7a6a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2732999


Auto-Submit: James Cook <jamescook@chromium.org>
Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Commit-Queue: Kyle Horimoto <khorimoto@chromium.org>
Cr-Commit-Position: refs/heads/master@{#859596}