Listen for fingerprint when on bouncer

To make unlocking work if keyguard is in occluded state and user
taps on a notification.

Bug: 22855718
Change-Id: Ide632f524a635e3e37741abaa77e258394c9a6e2

packages/Keyguard/src/com/android/keyguard/KeyguardUpdateMonitor.java

@@ -1032,7 +1032,7 @@ public class KeyguardUpdateMonitor implements TrustManager.TrustListener {
     }
 
     private boolean shouldListenForFingerprint() {
-        return (mKeyguardIsVisible || !mDeviceInteractive) && !mSwitchingUser
+        return (mKeyguardIsVisible || !mDeviceInteractive || mBouncer) && !mSwitchingUser
                 && !mFingerprintAlreadyAuthenticated && !isFingerprintDisabled(getCurrentUser());
     }
 
@@ -1365,6 +1365,7 @@ public class KeyguardUpdateMonitor implements TrustManager.TrustListener {
                 cb.onKeyguardBouncerChanged(isBouncer);
             }
         }
+        updateFingerprintListeningState();
     }
 
     /**