Disable fingerprint when remotely reset by DPM

When the device is lost or stolen, it's safer to
fall back to strong authentication (pin, pattern or
password).  This disables fingerprint like we do with
trust agents.

Fixes bug 21620081

Change-Id: I7bbe54be3721b2f160b783daeb3acbe434705046
diff --git a/packages/Keyguard/src/com/android/keyguard/KeyguardUpdateMonitor.java b/packages/Keyguard/src/com/android/keyguard/KeyguardUpdateMonitor.java
index c7adc98..113b1f4 100644
--- a/packages/Keyguard/src/com/android/keyguard/KeyguardUpdateMonitor.java
+++ b/packages/Keyguard/src/com/android/keyguard/KeyguardUpdateMonitor.java
@@ -548,6 +548,7 @@
 
     private final BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() {
 
+        @Override
         public void onReceive(Context context, Intent intent) {
             final String action = intent.getAction();
             if (DEBUG) Log.d(TAG, "received broadcast " + action);
@@ -599,6 +600,7 @@
 
     private final BroadcastReceiver mBroadcastAllReceiver = new BroadcastReceiver() {
 
+        @Override
         public void onReceive(Context context, Intent intent) {
             final String action = intent.getAction();
             if (AlarmManager.ACTION_NEXT_ALARM_CLOCK_CHANGED.equals(action)) {
@@ -713,6 +715,7 @@
             return new SimData(state, slotId, subId);
         }
 
+        @Override
         public String toString() {
             return "SimData{state=" + simState + ",slotId=" + slotId + ",subId=" + subId + "}";
         }
@@ -895,7 +898,9 @@
     }
 
     private boolean shouldListenForFingerprint() {
-        return mKeyguardIsVisible && !mSwitchingUser;
+        return mKeyguardIsVisible && !mSwitchingUser &&
+                mTrustManager.hasUserAuthenticatedSinceBoot(
+                        ActivityManager.getCurrentUser());
     }
 
     private void startListeningForFingerprint() {