Fix hun-to-shade corner clipping

Bug: 189145086
Test: swipe down from hun to transition to shade => no weird clipping

Change-Id: I4ee72b63b1dd167d462b3f91db8c3788b7f4d528

packages/SystemUI/src/com/android/systemui/statusbar/NotificationShelf.java

@@ -358,9 +358,13 @@ public class NotificationShelf extends ActivatableNotificationView implements
                 && anv instanceof ExpandableNotificationRow
                 && ((ExpandableNotificationRow) anv).isHeadsUp();
 
+        final boolean isHunGoingToShade = mAmbientState.isShadeExpanded()
+                && anv == mAmbientState.getTrackedHeadsUpRow();
+
         final boolean shouldUpdateCornerRoundness = viewStart < shelfStart
                 && !mHostLayoutController.isViewAffectedBySwipe(anv)
                 && !isUnlockedHeadsUp
+                && !isHunGoingToShade
                 && !mAmbientState.isPulsing()
                 && !mAmbientState.isDozing();