Some logitech devices seem to reboot immediately and the failures then
look like a broken pipe, but are actually the device rebooting.
If the device really did fail to detach after the timeout is done we'll
see a message that the device failed to come back instead.
Some plugins have devices with more than one protocol. Logically the protocol
belongs to the device, not the plugin, and in the future we could use this to
further check firmware that's about to be deployed.
This is also not exported into libfwupd (yet?) as it's remains a debug-feature
only -- protocols are not actually required for devices to be added.
