Add yuhengh@chromium.org to chrome/browser/ui/views/tab_search/OWNERS

Change-Id: I99d1da75f3f57500b517909b94f00ebbefbac118
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2443529
Commit-Queue: Thomas Lukaszewicz <tluk@chromium.org>
Reviewed-by: Thomas Lukaszewicz <tluk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#812832}

chrome/browser/ui/views/tab_search/OWNERS

 robliao@chromium.org
 tluk@chromium.org
+yuhengh@chromium.org
 
 # COMPONENT: UI>Browser>TabSearch