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.
1. Main binary now parses a config toml and uses its paths for the
output pcap and qmdl files
2. Previously we were relying on DiagDeviceError for several things
that aren't a diag device. This modularizes that error in a way
that both improves the error descriptions, and also allows for
better separation of concerns.
