GitLab

When caBLE v2 is enabled, use an updated transport selection dialog that
indicates active discoveries with spinner entries. This communicates
that either a USB or caBLE authenticator may be used, while still
allowing the user to select other options.

BUG=1002262

Change-Id: I8bd38500911025d5441975980e3ab9a63517410a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2025577Reviewed-by: Martin Kreichgauer <martinkr@google.com>
Commit-Queue: Adam Langley <agl@chromium.org>
Cr-Commit-Position: refs/heads/master@{#736567}