[bc25] Fix notifications not being rendered on Dual Shade.

The bug was caused due to a recent change in NSSL that
requires positioning a `NotificationStackCutoffGuideline`
composable which communicates the bottom rendering boundary
to the NSSL.

Bug: 340553529
Bug: 348641274
Test: Manually verified on a device by opening and closing the
notifications dual shade.
Test: Existing unit tests still pass.
Flag: com.android.systemui.dual_shade

Change-Id: I03cc302c2f89f14e6a8724f49cfb93fb4eab3b16

1 files changed, 6 insertions, 0 deletions

diff --git a/packages/SystemUI/compose/features/src/com/android/systemui/notifications/ui/composable/NotificationsShadeScene.kt b/packages/SystemUI/compose/features/src/com/android/systemui/notifications/ui/composable/NotificationsShadeScene.kt
index 899b2569bb26..db98bc8fff9c 100644
--- a/packages/SystemUI/compose/features/src/com/android/systemui/notifications/ui/composable/NotificationsShadeScene.kt
+++ b/packages/SystemUI/compose/features/src/com/android/systemui/notifications/ui/composable/NotificationsShadeScene.kt
@@ -96,6 +96,12 @@ constructor(
                     shadeMode = ShadeMode.Dual,
                     modifier = Modifier.fillMaxWidth(),
                 )
+
+                // Communicates the bottom position of the drawable area within the shade to NSSL.
+                NotificationStackCutoffGuideline(
+                    stackScrollView = stackScrollView.get(),
+                    viewModel = notificationsPlaceholderViewModel,
+                )
             }
         }
     }