This way even if a USB device wasn't added through an Android intent, we
still have a way to scan for it and select it. This is especially
important in case a user has a cable that we haven't seen yet (i.e. with
a VID/PID that we haven't added to Subsurface-mobile), but that
nevertheless works with the android usb serial drivers.
This also makes the flow a little more logical / consistent when
deciding which connections to show.
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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