Create an STA concurrency check that works on Android 9 and 10

[ccameron-gb]

Described in Notion.

We have code to prevent devices that don't support STA/AP concurrency from trying to simultaneously be a hotspot and client. However, our method of checking for concurrency support doesn't seem to work for Android 9 and 10. In these cases, we default to disabling concurrency.

This is not ideal because it limits how "meshed" our network can be.

We need to think of an alternative. Perhaps an expensive initial test (like actually trying to turn both on) that we then cache so it only needs to be done once.