GitLab

Created a new class CrostiniStartupStatus which shows
a progress bar and spinner, and adds color and emojis.

Full status is shown when the terminal starts and
the container is not running.  Otherwise no status is
shown if the container is already running.

TBR=benwells@chromium.org

Bug: 1016680
Change-Id: I726d9d721937f74a40bba646339a3e9fd97e5a36
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1888239
Commit-Queue: Joel Hockey <joelhockey@chromium.org>
Reviewed-by: Julian Watson <juwa@google.com>
Cr-Commit-Position: refs/heads/master@{#711156}