GitLab

Handles press of opt in to trigger onboarding flow.

There didn't seem to be a great place to put this so I broke out an
AssistantSetupController. Potentially this might be a good place to
cache settings state on the Ash side in the future when we clean up
VoiceInteractionController.

Note that the AssistantOptInView is still hidden programmatically.
A follow up CL will show this view when appropriate.

See bug for demo.

Bug: b:111315696
Change-Id: I6438abc780d2d5e5753dd22c34c477b7364324e4
Reviewed-on: https://chromium-review.googlesource.com/1166259
Commit-Queue: David Black <dmblack@google.com>
Reviewed-by: Xiaohui Chen <xiaohuic@chromium.org>
Cr-Commit-Position: refs/heads/master@{#581891}