The engine -> framework roll is failing #68891
Description
Beginning with #68821, the engine -> framework roll is failing with an error in the framework tests:
00:01 +0: loading /b/s/w/ir/k/flutter/packages/flutter_test/test/bindings_test_failure.dart Shell: [ERROR:flutter/shell/common/shell.cc(209)] Dart Error: error: Library 'package:vector_math/hash.dart' was compiled with sound null safety (in strong mode) and it requires --sound-null-safety option at runtime
Shell: [ERROR:flutter/runtime/dart_isolate.cc(141)] Could not prepare isolate.
Shell: [ERROR:flutter/runtime/runtime_controller.cc(377)] Could not create root isolate.
Shell: [ERROR:flutter/shell/common/shell.cc(492)] Could not launch engine with configuration.
That engine roll contains only rolls from Skia, Fuchsia, and Dart. I am suspicious of the Dart roll: flutter/engine#22058. We should try reverting it locally to see if that helps.