title: how to register Fingerprint for Authentication on Nexus emulator
body: <p>there is no response after I typed adb -s emulator-5554 emu finger touch 1. 
  this is reference link 
  <a href="https://github.com/googlesamples/android-FingerprintDialog/issues/2" rel="nofollow">https://github.com/googlesamples/android-FingerprintDialog/issues/2</a></p>