[flexiglass] Add legacy assertion to NSSL.setOverScrollAmount

Bug: 347740893
Test: no crashes during stack scroll CUJs with flexiglass enabled
Flag: com.android.systemui.scene_container
Change-Id: Id484362a712b39addfd73b7ccf7304aa2f0a8bd1

1 files changed, 1 insertions, 0 deletions

diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/NotificationStackScrollLayout.java b/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/NotificationStackScrollLayout.java
index d0c51bc28126..e6e694d2113d 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/NotificationStackScrollLayout.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/NotificationStackScrollLayout.java
@@ -2307,6 +2307,7 @@ public class NotificationStackScrollLayout
 
     private void setOverScrollAmountInternal(float amount, boolean onTop, boolean animate,
                                              boolean isRubberbanded) {
+        SceneContainerFlag.assertInLegacyMode();
         amount = Math.max(0, amount);
         if (animate) {
             mStateAnimator.animateOverScrollToAmount(amount, onTop, isRubberbanded);