[fuchsia] Plumb root_surface_transformation in scene_update_context (flutter#6187)

* [fuchsia] Plumb root_surface_transformation in scene_update_context

To fix the Fuchsia build.

* Update scene_update_context.cc

Author: zanderso

flow/scene_update_context.cc

@@ -187,9 +187,12 @@ SceneUpdateContext::ExecutePaintTasks(CompositorContext::ScopedFrame& frame) {
   for (auto& task : paint_tasks_) {
     FML_DCHECK(task.surface);
     SkCanvas* canvas = task.surface->GetSkiaSurface()->getCanvas();
-    Layer::PaintContext context = {*canvas, frame.context().frame_time(),
+    Layer::PaintContext context = {*canvas,
+                                   frame.root_surface_transformation(),
+                                   frame.context().frame_time(),
                                    frame.context().engine_time(),
-                                   frame.context().texture_registry(), false};
+                                   frame.context().texture_registry(),
+                                   false};
     canvas->restoreToCount(1);
     canvas->save();
     canvas->clear(task.background_color);