GitLab

- Adds the new Folder assets. (For the regular folder I replaced some un-used assets)
- Changes BookmarkFolderVC to match the UIRefresh styling.
- Creates TableViewBookmarkFolderCell with the UIRefresh styling.

Screenshot:
https://drive.google.com/open?id=1Pq5CtxhnfjA3FDyWEN-E4KzE43kJt0LZ

Bug: 839451
Cq-Include-Trybots: luci.chromium.try:ios-simulator-full-configs;master.tryserver.chromium.mac:ios-simulator-cronet
Change-Id: Ia76fd4173f5f1c4f9ff9e75a4e87b675d20c81c2
Reviewed-on: https://chromium-review.googlesource.com/1066939Reviewed-by: Rohit Rao <rohitrao@chromium.org>
Commit-Queue: Sergio Collazos <sczs@chromium.org>
Cr-Commit-Position: refs/heads/master@{#560746}