Added permissions owners to the permission_bubble folder

Bug: 1016730
Change-Id: Ieaa83466e9be27b570c4dfc5cfce26ab0fede220
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2367946
Auto-Submit: Andy Paicu <andypaicu@chromium.org>
Commit-Queue: Raymes Khoury <raymes@chromium.org>
Reviewed-by: Raymes Khoury <raymes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#800885}

chrome/browser/ui/permission_bubble/OWNERS

 # Please use for OWNERS code reviews
+file://components/permissions/PERMISSIONS_OWNERS
 benwells@chromium.org
 estark@chromium.org
 felt@chromium.org