Hide UdfpsKeyguardView onIllumination

So the HbmSurfaceView can show

Test: put device in dark mode, tap on notif, can
still auth via udfps
Bug: 175717712

Change-Id: If7b04fb386727dc1eebb76191729c6ebf9fcda51

packages/SystemUI/src/com/android/systemui/biometrics/UdfpsKeyguardView.java

@@ -72,6 +72,16 @@ public class UdfpsKeyguardView extends UdfpsAnimationView {
         return mFingerprintDrawable;
     }
 
+    @Override
+    void onIlluminationStarting() {
+        setVisibility(View.INVISIBLE);
+    }
+
+    @Override
+    void onIlluminationStopped() {
+        setVisibility(View.VISIBLE);
+    }
+
     @Override
     public boolean dozeTimeTick() {
         // TODO: burnin