Add Daniel and Jason as committers

Change-Id: I51f4442d9fb4cb8c1eeed8618e03606227549fba
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2384449
Commit-Queue: Joel Hockey <joelhockey@chromium.org>
Commit-Queue: Nicholas Verne <nverne@chromium.org>
Reviewed-by: Daniel Ng <danielng@google.com>
Reviewed-by: Nicholas Verne <nverne@chromium.org>
Cr-Commit-Position: refs/heads/master@{#802993}

chrome/browser/chromeos/guest_os/OWNERS

+danielng@google.com
 davidmunro@google.com
 hollingum@google.com
 joelhockey@chromium.org
+lxj@google.com
 nverne@chromium.org
 sidereal@google.com
 timloh@chromium.org