Refactor Animated[List, Grid, SliverList, SliverGrid] to share common code (#113793)

packages/flutter/lib/src/rendering/sliver_grid.dart

@@ -462,9 +462,9 @@ class SliverGridDelegateWithMaxCrossAxisExtent extends SliverGridDelegate {
   SliverGridLayout getLayout(SliverConstraints constraints) {
     assert(_debugAssertIsValid(constraints.crossAxisExtent));
     int crossAxisCount = (constraints.crossAxisExtent / (maxCrossAxisExtent + crossAxisSpacing)).ceil();
-    // TODO(gspencergoog): Figure out why we need this in release mode (and only
-    // in release mode). https://github.com/flutter/flutter/issues/113109
-    crossAxisCount = crossAxisCount < 1 ? 1 : crossAxisCount;
+    // Ensure a minimum count of 1, can be zero and result in an infinite extent
+    // below when the window size is 0.
+    crossAxisCount = math.max(1, crossAxisCount);
     final double usableCrossAxisExtent = math.max(
       0.0,
       constraints.crossAxisExtent - crossAxisSpacing * (crossAxisCount - 1),

packages/flutter/lib/widgets.dart

@@ -19,8 +19,7 @@ export 'foundation.dart' show UniqueKey;
 export 'rendering.dart' show TextSelectionHandleType;
 export 'src/widgets/actions.dart';
 export 'src/widgets/animated_cross_fade.dart';
-export 'src/widgets/animated_grid.dart';
-export 'src/widgets/animated_list.dart';
+export 'src/widgets/animated_scroll_view.dart';
 export 'src/widgets/animated_size.dart';
 export 'src/widgets/animated_switcher.dart';
 export 'src/widgets/annotated_region.dart';