Reland "Add a network and an error screens for the floating workspace dialog"

This is a reland of commit 581409ab3fb537f9a3c1888f9d28d963bf65f8cf

This change was reverted because another CL broke msan build and
couldn't be cleanly reverted without affecting this CL.

Original change's description:
> Add a network and an error screens for the floating workspace dialog
>
> This dialog reuses some OOBE styles and is supposed
> to be shown on the session startup, while floating
> workspace is restoring the session. Network screen
> is shown when no network is available and allows the
> user to fix that. Error screen is shown when
> FW service failed for an unknown reason.
>
> Screenshots:
> Default screen: screenshot/3ErR6vpqEVYQFPF.png
> Network screen: screenshot/BsYSNsuWnYzo7RY.png
> Error screen: screenshot/AeRdZTuUVmQ6PXh.png
>
> Bug: b:411121762
> Change-Id: I1d184c124848e1fb431f434488b52152f72b422d
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6548576
> Reviewed-by: Andrey Davydov <andreydav@google.com>
> Commit-Queue: Michael Slutskii <slutskii@google.com>
> Cr-Commit-Position: refs/heads/main@{#1460823}

Bug: b:411121762
Change-Id: I78aa0b46e0055115858db36c751569e0b461df9a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6554665
Commit-Queue: Michael Slutskii <slutskii@google.com>
Reviewed-by: Andrey Davydov <andreydav@google.com>
Cr-Commit-Position: refs/heads/main@{#1461327}