Additional ListTile API doc - Material widget dependency (#86355)

packages/flutter/lib/src/material/list_tile.dart

@@ -269,7 +269,28 @@ enum ListTileControlAffinity {
 /// List tiles are typically used in [ListView]s, or arranged in [Column]s in
 /// [Drawer]s and [Card]s.
 ///
-/// Requires one of its ancestors to be a [Material] widget.
+/// One ancestor must be a [Material] widget and typically this is
+/// provided by the app's [Scaffold]. The [tileColor],
+/// [selectedTileColor], [focusColor], and [hoverColor] are not
+/// painted by the list tile itself but by the material widget
+/// ancestor. This generally has no effect. However, if an opaque
+/// widget, like `Container(color: Colors.white)`, is included in
+/// between the [ListTile] and its [Material] ancestor, then the
+/// opaque widget will obscure the material widget and its background
+/// [tileColor], etc. If this a problem, one can wrap a material
+/// widget around the list tile, e.g.:
+///
+/// ```dart
+/// Container(
+///   color: Colors.green,
+///   child: Material(
+///     child: ListTile(
+///       title: const Text('ListTile with red background'),
+///       tileColor: Colors.red,
+///     ),
+///   ),
+/// )
+/// ```
 ///
 /// {@tool snippet}
 ///