GitLab

* Adds controls for Do Not Disturb, Tether status, and is phone ringing
* Controls are 2 ways - they reflect the current state of the status
  they control. I.e if the tether status changes without the user
  explicitly changing the status, it will show up in the dropdown.
  Likewise, if the user changes the status, it will change the status
  to the selected one. Same for DND and phone ringing.
* Adds a control for showing onboard ui

Screenshots:
https://screenshot.googleplex.com/jjS26PAyiaK8KRz (quick action)
https://screenshot.googleplex.com/8THgG3zX4nHfCdu (onboarding)

Bug: 1106937
Change-Id: I5bd8a5d02c0be5aba95d6c816cf7c327c51c986d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2429846
Commit-Queue: Regan Hsu <hsuregan@chromium.org>
Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Cr-Commit-Position: refs/heads/master@{#810889}