CryptAuth: Update OWNERS file.

Change-Id: I46f7c22d556302df6a657742fcee5c253e14a437
Reviewed-on: https://chromium-review.googlesource.com/c/1330119Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Commit-Queue: James Hawkins <jhawkins@chromium.org>
Cr-Commit-Position: refs/heads/master@{#607263}

components/cryptauth/OWNERS

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