Roll Dart SDK from 922c315b2c34 to 8eaed3382237 (1 revision) (flutter/engine#42862)

https://dart.googlesource.com/sdk.git/+log/922c315b2c34..8eaed3382237

2023-06-14 dart-internal-merge@dart-ci-internal.iam.gserviceaccount.com Version 3.1.0-213.0.dev

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/dart-sdk-flutter-engine
Please CC chinmaygarde@google.com,dart-vm-team@google.com on the revert to ensure that a human
is aware of the problem.

To file a bug in Flutter Engine: https://github.com/flutter/flutter/issues/new/choose

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

DEPS

@@ -53,7 +53,7 @@ vars = {
   # Dart is: https://github.com/dart-lang/sdk/blob/main/DEPS
   # You can use //tools/dart/create_updated_flutter_deps.py to produce
   # updated revision list of existing dependencies.
-  'dart_revision': '922c315b2c34dfde1f4e98a4057a8941ea0298b8',
+  'dart_revision': '8eaed338223795094b6cf2d1a4006399ce6c9f96',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py