Support for MyDevices beacon / auth

[AkazaRenn]

Right now it requires the Windows side to set the Nearby sharing to be set as Everyone nearby to be able to be seen, it would be very handy if My devices only can work instead so I don't need to keep toggling Nearby sharing on Windows on and off.

[ShortDevelopment]

I’ll come back to this, after I’ve finished the basic custom implementation. This feature should be possible with the ms implementation right now, but I currently want to focus on replacing their old and buggy implementation with my own…