dvAndroidNfcAvailable function
Whether NFC can read something now.
Both halves, and neither on its own. A phone with the hardware and NFC
switched off in settings is exactly the case where a true puts "hold
your card against the back of the phone" in front of somebody whose phone
will never answer. Linux draws the same line: it looks for a powered
neard adapter rather than a present one.
Implementation
bool dvAndroidNfcAvailable({
required bool hasAdapter,
required bool enabled,
}) =>
hasAdapter && enabled;