Make sure expandingFinished gets called when going into QS

Bug: 22351040
Bug: 22306637
Change-Id: I8d1f9fb400b328753bd8444bf3b4a744ad23a53a

packages/SystemUI/src/com/android/systemui/statusbar/phone/NotificationPanelView.java

@@ -965,6 +965,7 @@ public class NotificationPanelView extends PanelView implements
     private void onQsExpansionStarted(int overscrollAmount) {
         cancelQsAnimation();
         cancelHeightAnimator();
+        notifyExpandingFinished();
 
         // Reset scroll position and apply that position to the expanded height.
         float height = mQsExpansionHeight - mScrollView.getScrollY() - overscrollAmount;

packages/SystemUI/src/com/android/systemui/statusbar/phone/PanelView.java

@@ -111,7 +111,7 @@ public abstract class PanelView extends FrameLayout {
      */
     private float mNextCollapseSpeedUpFactor = 1.0f;
 
-    private boolean mExpanding;
+    protected boolean mExpanding;
     private boolean mGestureWaitForTouchSlop;
     private boolean mIgnoreXTouchSlop;
     private Runnable mPeekRunnable = new Runnable() {
@@ -137,7 +137,7 @@ public abstract class PanelView extends FrameLayout {
         }
     }
 
-    private void notifyExpandingFinished() {
+    protected final void notifyExpandingFinished() {
         if (mExpanding) {
             mExpanding = false;
             onExpandingFinished();