Android apps that launch a browser (native) to do authentication, don't communicate back, eg TapKey

The realistic option for you is to install an Android Browser and use that as suggested in this thread.

This is not known.

If you have some spare time, you can try this hack on your own (and at your own risk!) and share your experience and feedback in that thread:

There are no known plans for NFC support in the Android subsystem.

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