Don't use the nested scroll view in Column

This breaks overscroll.

I looked into the PR that added this, which was an attempt
to work-around a problem where a RecyclerView was nested
in a scrollable column. We shouldn't ever do that, so this
work-around should be unnecessary.

redwood-layout-view/src/main/kotlin/app/cash/redwood/layout/view/ViewFlexContainer.kt

@@ -25,6 +25,7 @@ import android.widget.HorizontalScrollView
 import androidx.core.view.children
 import androidx.core.widget.NestedScrollView
 import androidx.core.widget.NestedScrollView.OnScrollChangeListener as OnScrollChangeListenerCompat
+import android.widget.ScrollView
 import app.cash.redwood.Modifier
 import app.cash.redwood.layout.api.Constraint
 import app.cash.redwood.layout.api.CrossAxisAlignment
@@ -226,7 +227,7 @@ internal class ViewFlexContainer(
           isFillViewport = true
         }
       } else {
-        NestedScrollView(context).apply {
+        ScrollView(context).apply {
           isFillViewport = true
         }
       }.apply {