Add Invalidate API call 

See: https://stackoverflow.com/questions/73529651/call-fingerprint-scanfingerprint-but-fingerprint-dialog-doesnt-show-up-when-it

Such an API will let a developer explicitly discard biometric cache and force a rescan. This will only map to an actual call on iOS using this API:

https://developer.apple.com/documentation/localauthentication/lacontext/1514192-invalidate?language=objc