Use component/content_settings/OWNERS file for c/b/content_settings

Change-Id: Ia4aa9b7760eba459877c4e10206d4c3eb20a9e5d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2339995Reviewed-by: Martin Šrámek <msramek@chromium.org>
Reviewed-by: Raymes Khoury <raymes@chromium.org>
Reviewed-by: Balazs Engedy <engedy@chromium.org>
Reviewed-by: Jochen Eisinger <jochen@chromium.org>
Commit-Queue: Christian Dullweber <dullweber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#797590}

chrome/browser/content_settings/OWNERS

-engedy@chromium.org
-msramek@chromium.org
-raymes@chromium.org
+file://components/content_settings/OWNERS
 
 # COMPONENT: Internals>Permissions>Model