[roll] Roll fuchsia Revert "[session_manager] Add SC option for autolaunch."

This reverts commit 175657b224f320eaf28c838f202e641ac832a648.

Reason for revert: https://buganizer.corp.google.com/issues/280031397

Original change's description:
> [session_manager] Add SC option for autolaunch.
>
> This adds a structured config option to the session-manager component
> indicating whether session-manager should launch the default session
> as soon as it starts up.
>
> Because developer overrides aren't yet supported, I've also added in a
> hack: there's a magic file in the `data` directory, which forces
> `autolaunch` to be `false`. This should be replaced with a
> well-supported SC feature as soon as one is available.
>
> To turn off autolaunch, run:
>
>     fx shell 'mkdir -p /data/session-manager && echo "" > /data/session-manager/noautolaunch'
>
> To re-enable it:
>
>     fx shell 'rm /data/session-manager/noautolaunch'
>
> I also added some integration tests.
>
> Original-Fixed: https://b/issues/277078620
>
> Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/843796

Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/849778
Original-Revision: 73ce177dab42426ac7d55444cdc28658c5d3e35c
GitOrigin-RevId: 8d8e01d83c53b1b293d326b06902d12fc319b8d4
Change-Id: I59c2e30669a7be839bbaac0ed003e66a79e71934