title: BiometricPromptCompat: Disable Iris/Face recognition (only allow fingerprints)
body: <p>I've got an app that uses BiometricPrompt to implement biometric based authentication. I've noted that some devices offer Iris/Face recognition as an option alongside fingerprint scan.</p>
  <p>I want my app to only allow fingerprint scanning. It it possible to only allow this? Alternatively, would it be possible to determine what method the user selected to authenticate so I could deny the request in my callback code?</p>