SmartLock: Update OWNERS file to be current.

Bug: none
Test: none
Change-Id: I8a53e499f6c574b82f617092d91daa8fbfa3e2c7
Reviewed-on: https://chromium-review.googlesource.com/947322Reviewed-by: Tim Song <tengs@chromium.org>
Commit-Queue: Tim Song <tengs@chromium.org>
Cr-Commit-Position: refs/heads/master@{#540699}

chrome/browser/chromeos/login/easy_unlock/OWNERS

-tengs@chromium.org
 xiyuan@chromium.org
+jhawkins@chromium.org
 
 # COMPONENT: UI>ProximityAuth