[fuchsia] Fix flutter_gallery BUILD.gn (#26015)

examples/flutter_gallery/BUILD.gn

diff --git a/examples/flutter_gallery/BUILD.gn b/examples/flutter_gallery/BUILD.gn
index ebca10d..fca749b 100644
--- a/examples/flutter_gallery/BUILD.gn
+++ b/examples/flutter_gallery/BUILD.gn
@@ -31,6 +31,8 @@
     "//third_party/dart-pkg/pub/flutter_gallery_assets",
     "//third_party/dart-pkg/pub/meta",
     "//third_party/dart-pkg/pub/path",
+    "//third_party/dart-pkg/pub/scoped_model",
+    "//third_party/dart-pkg/pub/shrine_images",
     "//third_party/dart-pkg/pub/source_span",
     "//third_party/dart-pkg/pub/string_scanner",
     "//third_party/dart-pkg/pub/typed_data",