Copy the device update state when replugging
Copy the device update state when replugging

At the moment we saving the new state as 'unknown' which explains why
we're getting so few LVFS reports uploaded for USB devices that perform
a replug...

Tested with a ColorHug2.

hughsie/fwupd,fwupd/fwupd,hughsie/fwupd,hughsie/fwupd,fwupd/fwupd,fwupd/fwupd,hughsie/fwupd,fwupd/fwupd