media: add new owners to Chrome OS Video Capture

Adding shik@ and hywu@ as owners of Chrome OS Video Capture.

R=wuchengli

Bug: None
Change-Id: I3ea88421720ea252ea1d74fb3bf0e63d0fec5327
Reviewed-on: https://chromium-review.googlesource.com/1146124Reviewed-by: Wu-Cheng Li <wuchengli@chromium.org>
Commit-Queue: Ricky Liang <jcliang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#577128}

media/capture/video/chromeos/OWNERS

 jcliang@chromium.org
 wuchengli@chromium.org
 posciak@chromium.org
+shik@chromium.org
+hywu@chromium.org