Summary:
When we start using Flipper from the CLI for automation, we want to have the list of currently connected devices as soon as flipper server is alive.
Otherwise, we would have to poll flipper server waiting for some magical moment in the future when devices connect.
This way, we can be certain that if flipper server started, but we do not see a device, it is not connected at all.
Reviewed By: mweststrate
Differential Revision: D40184106
fbshipit-source-id: ce4c2b897a2df0081e3a0b6a8c26640599e0f9e8