Roll Dart SDK from 9bea16a7dcbd to 96e29af6e0c6 (1 revision) (#42303)

https://dart.googlesource.com/sdk.git/+log/9bea16a7dcbd..96e29af6e0c6

2023-05-24 dart-internal-merge@dart-ci-internal.iam.gserviceaccount.com Version 3.1.0-143.0.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 bdero@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
diff --git a/DEPS b/DEPS
index 1a37810..ce71dca 100644
--- a/DEPS
+++ b/DEPS
@@ -53,7 +53,7 @@
   # 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': '9bea16a7dcbdf12f6bc019ca517e87dc3725a044',
+  'dart_revision': '96e29af6e0c69847b16bde7ee7976eb0efaac6af',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py
diff --git a/ci/licenses_golden/licenses_third_party b/ci/licenses_golden/licenses_third_party
index 59adfd5..49d9464 100644
--- a/ci/licenses_golden/licenses_third_party
+++ b/ci/licenses_golden/licenses_third_party
@@ -1,4 +1,4 @@
-Signature: a85bfd6f45b2d1deac12d6b2c6badf52
+Signature: 719f021cdf60d81fad75cab81494f488
 
 ====================================================================================================
 LIBRARY: angle