Call updateLayoutBounds on NestedArtboardLayout

I think this is the right fix here. Since the calls to updateLayoutBounds are now passed down through layout children rather than on advance, we also needed to call updateLayoutBounds on NestedArtboardLayout, since those "provide" their layout nodes to their parent artboards layout tree (thus updateLayoutBounds doesn't get called during their own Artboard's advance).

Diffs=
6931974fe3 Call updateLayoutBounds on NestedArtboardLayout (#8398)
c7cd1c8c74 editor: support vector n-slicing in runtime (#8395)
b3534f1f8f Nnnn text alignment and fit (#8385)
52963ca423 hierarchical updates to layout (#8386)
96d45f6824 Do not load files with invalid paint mutators. (#8366)
76f79a22e2 testing animation smoothing (#8363)
86f2d78a90 NestedArtboardLayout marks its parent artboard layoutNodeDirty (#8383)
2516daf1e0 Nnnn system data enums (#8380)
54629ea542 LayoutComponent clip defaults to false. (#8368)
0c8fa5c313 Add AdvancingComponent & animate flag to advance() (#8362)

Co-authored-by: Philip Chung <[email protected]>

.rive_head

@@ -1 +1 @@
-80da365913302db2a303def22846d02b35a4eab8
+6931974fe3eb4a5dcda546cafe2ed50e9da2c939

lib/src/rive_core/nested_artboard.dart

@@ -62,6 +62,7 @@ abstract class MountedArtboard {
   void artboardHeightOverride(double height, int heightUnitValue, bool isRow);
   void artboardWidthIntrinsicallySizeOverride(bool intrinsic);
   void artboardHeightIntrinsicallySizeOverride(bool intrinsic);
+  void updateLayoutBounds(bool animate);
   void dispose();
   void setDataContextFromInstance(ViewModelInstance viewModelInstance,
       DataContext? dataContextValue, bool isRoot);

lib/src/runtime_mounted_artboard.dart

@@ -99,6 +99,9 @@ class RuntimeMountedArtboard extends MountedArtboard {
   @override
   void artboardHeightIntrinsicallySizeOverride(bool intrinsic) {}
 
+  @override
+  void updateLayoutBounds(bool animate) {}
+
   @override
   double get originalArtboardWidth => originalArtboardInstanceSize.width;