The Bluetooth peer need only parcel up the BluetoothDevice, which
itself is parcelable. The wifi peer requires the JmDNS ServiceInfo
class to be parcelled. For this, I took the most full on looking
constructor, and parcelled up each individual property of the service
info object which is required by that constructor.
Also made the scan qr button hooked up to the swap process, and fixed
minor bugs with the "visible via wifi" TextView setup.
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