Fix weird state with QS expansion.

Bug: 15147023
Change-Id: Ief32ee756e22b330e0fb63b0dab64aa83ffb9124
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/NotificationPanelView.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/NotificationPanelView.java
index 7e3bf68..123a4f0 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/NotificationPanelView.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/NotificationPanelView.java
@@ -545,6 +545,9 @@
     }
     private void flingSettings(float vel, boolean expand) {
         float target = expand ? mQsMaxExpansionHeight : mQsMinExpansionHeight;
+        if (target == mQsExpansionHeight) {
+            return;
+        }
         ValueAnimator animator = ValueAnimator.ofFloat(mQsExpansionHeight, target);
         mFlingAnimationUtils.apply(animator, mQsExpansionHeight, target, vel);
         animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {