This feature adds support for platform capability BOS descriptors which allows
the device itself to ship quirk data.
Use `sudo fwupdtool get-devices --save-backends=FILENAME` to save fake backend
devices to a file. This allows easy creation of self tests that do not require
physical hardware.
Decrease the GUsb polling interval when any of the devices is in
`WAIT_FOR_REPLUG` on when running on Windows. Any device that can
re-enumerate much faster than the default 1000ms may be missed and the
detach may fail.
Linux doesn't have this problem as it has `LIBUSB_CAP_HAS_HOTPLUG`.
