CROS_OWNERS: update

Change-Id: Ibad08744af2d28f332b2c0459187f3ab0d3a6ef9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/1737469Reviewed-by: Alex Klein <saklein@chromium.org>
Reviewed-by: Nodir Turakulov <nodir@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>

CROS_OWNERS

 # Chrome OS developers looking over Chrome OS related files.
-lamont@chromium.org
+cjmcdonald@chromium.org
+lamontjones@chromium.org
 nednguyen@chromium.org
 saklein@chromium.org
 vapier@chromium.org