I volunteer as tribute

Add estark@ to chrome/browser/ui/login/OWNERS. I've been reworking
this code as part of HTTP auth committed interstitials.

Change-Id: I2d32dce71711e40ed3e85f90b5be5949750089a0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1678157Reviewed-by: Carlos IL <carlosil@chromium.org>
Reviewed-by: David Benjamin <davidben@chromium.org>
Commit-Queue: Emily Stark <estark@chromium.org>
Cr-Commit-Position: refs/heads/master@{#672555}

chrome/browser/ui/login/OWNERS

 carlosil@chromium.org
 davidben@chromium.org
+estark@chromium.org
 
 # COMPONENT: Internals>Network>Auth