Fix the illumination dot getting stuck

Bug: 158135499
Test: manual on device
Change-Id: Ie0e063e67940a178218272078049e202e233bb01

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

@@ -156,6 +156,7 @@ class UdfpsController {
     }
 
     private void hideUdfpsOverlay() {
+        onFingerUp();
         mHandler.post(() -> {
             Log.v(TAG, "hideUdfpsOverlay | removing window");
             if (mIsOverlayShowing) {

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

@@ -143,12 +143,12 @@ public class UdfpsView extends View {
     void onFingerDown() {
         mIsFingerDown = true;
         mSensorPaint.setStyle(Paint.Style.FILL);
-        invalidate();
+        postInvalidate();
     }
 
     void onFingerUp() {
         mIsFingerDown = false;
         mSensorPaint.setStyle(Paint.Style.STROKE);
-        invalidate();
+        postInvalidate();
     }
 }