[ios] Adds OWNERS files for table_view and list_model

Cq-Include-Trybots: master.tryserver.chromium.mac:ios-simulator-cronet;master.tryserver.chromium.mac:ios-simulator-full-configs
Change-Id: I175dc06add2d7c131ecd077062fa60de531968eb
Reviewed-on: https://chromium-review.googlesource.com/972192
Commit-Queue: Rohit Rao <rohitrao@chromium.org>
Reviewed-by: Rohit Rao <rohitrao@chromium.org>
Cr-Commit-Position: refs/heads/master@{#545815}

ios/chrome/browser/ui/list_model/OWNERS

+sczs@chromium.org
+rohitrao@chromium.org
+gambard@chromiumg.org
+
+# TEAM: ios-directory-owners@chromium.org
+# OS: iOS

ios/chrome/browser/ui/table_view/OWNERS

+sczs@chromium.org
+rohitrao@chromium.org
+
+# TEAM: ios-directory-owners@chromium.org
+# OS: iOS