Add meacer@ as a url_formatter owner

Change-Id: I9a6c3772e33e67cfe99f2d20da97c0f52aaa8fbd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1739543Reviewed-by: Tommy Li <tommycli@chromium.org>
Commit-Queue: Mustafa Emre Acer <meacer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#684444}

components/url_formatter/OWNERS

 pkasting@chromium.org
 tommycli@chromium.org
+meacer@chromium.org
 
 # Changes to FormatUrlForSecurityDisplay and FormatOriginForSecurityDisplay
 # require a security review to avoid introducing security bugs.

components/url_formatter/spoof_checks/OWNERS

-meacer@chromium.org