GitLab

Add public ash methods for showing network detailed view bubble.

Rationale: we are creating new UpdateRequiredScreen
on the sign-in screen, which contains a button for network selection.
Click on this button should open the bubble with the list of networks.

Bug: 1005151
Change-Id: I6a4acebcc700f7b400275598978f67ccc90d4d6d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1807232Reviewed-by: Steven Bennetts <stevenjb@chromium.org>
Reviewed-by: James Cook <jamescook@chromium.org>
Reviewed-by: Ivan Šandrk <isandrk@chromium.org>
Commit-Queue: Petr Smirnov <petrsmirnov@google.com>
Cr-Commit-Position: refs/heads/master@{#699957}