Without doing this, it seems macOS can't use any interface endpoints.
Also disconnect any kernel extensions that're using the interface,
since that can cause issues on macOS as well.
We need to wait for atfwd_daemon to startup before sending any AT
commands, and I can't think of a way to reliably do that within rust.
So, instead of trying to switch the device to command mode before
executing a command, require the user to run the "--root" step
beforehand, and then start executing AT commands.
Add tools for launching a root shell on the device, and for sending
serial commands to the device. Extend the make.sh script to push those
and configure a root shell. Commands can now be executed as root via:
adb shell rootshell -c \"touch /tmp/test\"
allowing automatic configuration of the tooling.
