Chrome OS: Integrate PIN setup into Discover UI

Bug: 852553
Change-Id: I460a420b1dd0024eaebb114aac2368a7bb3f28ae
Reviewed-on: https://chromium-review.googlesource.com/c/1249496
Reviewed-by: Devlin <rdevlin.cronin@chromium.org>
Reviewed-by: Jacob Dufault <jdufault@chromium.org>
Commit-Queue: Alexander Alekseev <alemate@chromium.org>
Cr-Commit-Position: refs/heads/master@{#599130}
36 files changed