GitLab

Reland as is because the fix was in the parent CL:
https://crrev.com/c/2426864/2

Original commit message:
> [Nearby] Trigger onboarding when first enabling Nearby
>
> This CL adds a pref to track if onboarding was run by this user before.
> If it has not, when enabling for the first time, onboarding is run first
> by navigating to the subpage and showing in a dialog. Once onboarding
> has been done once, the user can freely toggle on/off without
> triggering onboarding. However, onboarding will still run if the user
> triggers the pod button and the feature is disabled. This matches the
> Android behavior.
>
> Additionally, this CL fixes a bug with the premature closing of the
> shared receiveManager which needs to stay alive and connected after the
> dialog closes otherwise getReceiveManager returns a remote with a closed
> pipe.
>
> Bug: b/154866951
> Change-Id: I1e3cbd15f4995f019b3476c2f7a69f67d6eb1888
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2424763
> Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
> Commit-Queue: James Vecore <vecore@google.com>
> Cr-Commit-Position: refs/heads/master@{#809623}

Change-Id: I91e3a3749ae15ae6bf7879c259e3622e74eba337
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2427004Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Commit-Queue: James Vecore <vecore@google.com>
Cr-Commit-Position: refs/heads/master@{#810082}