Roll Dart SDK from d5d05146868a to eaeca487c944 (2 revisions) (#46138)

https://dart.googlesource.com/sdk.git/+log/d5d05146868a..eaeca487c944

2023-09-21 dart-internal-merge@dart-ci-internal.iam.gserviceaccount.com Version 3.2.0-187.0.dev
2023-09-20 dart-internal-merge@dart-ci-internal.iam.gserviceaccount.com Version 3.2.0-186.0.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 dart-vm-team@google.com,jonahwilliams@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

Author: skia-flutter-autoroll

DEPS

@@ -57,7 +57,7 @@ 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': 'd5d05146868a5489e8dfc6f049536277dc437a20',
+  'dart_revision': 'eaeca487c944c92612e5674b8eb2d49030327d05',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py

ci/licenses_golden/licenses_dart

@@ -1,4 +1,4 @@
-Signature: 312266be9d532450c78136442943ffb7
+Signature: 74953727d0af6d818f0131146cadbf11
 
 ====================================================================================================
 LIBRARY: dart