STL Demo: Add EdgeWithPreview in interactive Notifications

A drag down gesture on a notification in LockScreen should expand it,
and if we continue the gesture we should open the shade.

See b/336710600#comment12

Test: No tests
Bug: 336710600
Flag: EXEMPT demo app
Change-Id: Ibfbe400af5237e55489a62f32f3de5da7045d7a8
diff --git a/samples/SceneTransitionLayoutDemo/src/com/android/compose/animation/scene/demo/notification/Notification.kt b/samples/SceneTransitionLayoutDemo/src/com/android/compose/animation/scene/demo/notification/Notification.kt
index 851b3b9..385a342 100644
--- a/samples/SceneTransitionLayoutDemo/src/com/android/compose/animation/scene/demo/notification/Notification.kt
+++ b/samples/SceneTransitionLayoutDemo/src/com/android/compose/animation/scene/demo/notification/Notification.kt
@@ -33,6 +33,7 @@
 import androidx.compose.ui.unit.dp
 import com.android.compose.animation.scene.MovableElementKey
 import com.android.compose.animation.scene.MutableSceneTransitionLayoutState
+import com.android.compose.animation.scene.NestedScrollBehavior
 import com.android.compose.animation.scene.SceneKey
 import com.android.compose.animation.scene.SceneScope
 import com.android.compose.animation.scene.SceneTransitionLayout
@@ -105,16 +106,20 @@
                     Modifier.fillMaxWidth()
                         .notificationClip(remember { Path() }, { topRadius }, { bottomRadius })
                         .thenIf(isInteractive) {
-                            Modifier.clickable {
-                                viewModel.state.setTargetScene(
-                                    when (viewModel.state.transitionState.currentScene) {
-                                        Notification.Scenes.Expanded ->
-                                            Notification.Scenes.Collapsed
-                                        else -> Notification.Scenes.Expanded
-                                    },
-                                    coroutineScope,
+                            Modifier.verticalNestedScrollToScene(
+                                    topBehavior = NestedScrollBehavior.EdgeWithPreview,
+                                    bottomBehavior = NestedScrollBehavior.EdgeWithPreview,
                                 )
-                            }
+                                .clickable {
+                                    viewModel.state.setTargetScene(
+                                        when (viewModel.state.transitionState.currentScene) {
+                                            Notification.Scenes.Expanded ->
+                                                Notification.Scenes.Collapsed
+                                            else -> Notification.Scenes.Expanded
+                                        },
+                                        coroutineScope,
+                                    )
+                                }
                         }
                         .background(backgroundColor)
                 ) {