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Add UI for the update check, and support for base error and
offline for the update check.  Actual update check logic will be
added later after addition of support for ad-hoc queries to the service.

Bug: 1078782
Change-Id: I78a5a5b1713a8a040dde638cfbcdecbb313bbd5a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2352907
Commit-Queue: Sean Harrison <harrisonsean@chromium.org>
Reviewed-by: Javier Ernesto Flores Robles <javierrobles@chromium.org>
Cr-Commit-Position: refs/heads/master@{#802375}