GitLab

This CL converts the DataplanUsageCollectionViewController to
UITableViewController.
It also adds the cellBackgroundColor property to the styler so the cells
can have a background color different from the table view's background.
It also adds an accessoryType for the DetailTextItem.

Bug: 894791
Cq-Include-Trybots: luci.chromium.try:ios-simulator-cronet;luci.chromium.try:ios-simulator-full-configs
Change-Id: Ie1332811d3df6d8ef7650fb34fa3a17a515da3d9
Reviewed-on: https://chromium-review.googlesource.com/c/1286142
Commit-Queue: Gauthier Ambard <gambard@chromium.org>
Reviewed-by: Sergio Collazos <sczs@chromium.org>
Cr-Commit-Position: refs/heads/master@{#601109}