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- Displays a message to users if there is no connection to
  the internet.
- This CL adds cloud off icons for settings printers landing
  page.
- Fixes a bug where cupsPrinters wasn't correctly checking for
  connectivity status.
- Updates browserTests.
- Updates fake network api's for testing.
- This CL is hidden behind the enableUpdatedUi feature flag.

Bug: 965721
Test: End to End manual, browserTests
Change-Id: Ic0cec85aeba408a02d7ec1bb864a8ae00c31c915
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1715731
Commit-Queue: jimmy gong <jimmyxgong@chromium.org>
Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Reviewed-by: Steven Bennetts <stevenjb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#683684}