Add fingerprint detection support to Keyguard.

Tested:
- power-on with fingerprint sensor
- dismiss bouncer with fingerprint
- fingerprint to enter trusted state

Change-Id: I6aab7591d370412a143fe219a1575b2719a4de96
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/UnlockMethodCache.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/UnlockMethodCache.java
index bfd657b..c9e0db6 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/UnlockMethodCache.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/UnlockMethodCache.java
@@ -99,6 +99,10 @@
         public void onScreenTurnedOn() {
             updateMethodSecure(false /* updateAlways */);
         }
+
+        public void onFingerprintRecognized(int userId) {
+            updateMethodSecure(false /* updateAlways */);
+        }
     };
 
     public static interface OnUnlockMethodChangedListener {