title: Fingerprint manager not working from background
body: <p>I am creating an App locker that authenticate fingerprint when the locked app is opened.
  I noticed that the fingerprint manager not working when I put my app in the background.
  After several days of research, I found that Fingerprint Manager checks for Foreground activity for working.
  One solution is that give accessibility permission to the app and everything will be fine.
  but I noticed that many apps fingerprints work well from foreground service without asking accessibility permission or any other permission.
  I am stuck in this part.
  I have searched a lot but didn't find any solution to this problem.
  Even the Official doc didn't mention this restriction.</p>