Handle bluetooth adapter hotplugging gracefully

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Describe the bug Buttplug-rs has no way to handle whether a bluetooth adapter was plugged in or removed while it is running

Additional context buttplug-rs uses btleplug (https://github.com/deviceplug/btleplug), which doesn't have a way of detecting adapter hotplugging yet. This means that it's difficult to manage adapters being un/plugged while the library is being used. This will require fixes in btleplug first, but those should propagate up once that's done.

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This is probably never going to happen, and is such a weird thing that we should just spew errors if it does happen. I suspect we'll see it on mobile when people turn on airplane mode or something, but we should just see our available adapters fall to zero or something?