title: How to check if new finger was added?
body: <p>I have an app with fingerprint authentication. It has been working fine till Android 8 was released. So the problem is that when I enroll new fingerprints there is no <code>KeyPermanentlyInvalidatedException</code>. So it happens only on Android 8, lower API's are fine with that and I can check if new fingerprint was added by this exception. How could I check new fingerprint in Android 8? 
  Google sample App - FingerprintDialog - also has same problem. It does not see changes in enrolling new fingerprint.
  Opened google issue:
  <a href="https://issuetracker.google.com/issues/65578763" rel="noreferrer">https://issuetracker.google.com/issues/65578763</a></p>