Remote jobs (debug bundle requests from management) are gated behind
Config.RemoteJobsAllowed, which defaults to false and could only be
enabled through the CLI flag or an MDM policy. The mobile SDKs had no
way to set it, so the mobile clients always refused the job.
Add GetRemoteJobsAllowed/SetRemoteJobsAllowed to both mobile
Preferences types, following the existing ServerSSHAllowed accessors,
so the apps can offer a settings toggle for it.
