Roll Dart SDK from 426453fdc4fb to 23c2ee55db5a (2 revisions) (#36576)

diff --git a/DEPS b/DEPS
index ca41632..6dcb2a4 100644
--- a/DEPS
+++ b/DEPS
@@ -43,7 +43,7 @@
   # 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': '426453fdc4fbeaa62689155d58a158e8143b812f',
+  'dart_revision': '23c2ee55db5a55691d78f318a0dcf44deaf79b6d',
 
   # 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 c9101d9..6597f9d 100644
--- a/ci/licenses_golden/licenses_third_party
+++ b/ci/licenses_golden/licenses_third_party
@@ -1,4 +1,4 @@
-Signature: 8f41f1108deb09e08ffeea247e19672f
+Signature: 87f2973f173816c1c7c4f05123ac1047
 
 UNUSED LICENSES:
 
@@ -12889,6 +12889,8 @@
 FILE: ../../../third_party/dart/runtime/tools/heapsnapshot/lib/heapsnapshot.dart
 FILE: ../../../third_party/dart/runtime/tools/heapsnapshot/lib/src/analysis.dart
 FILE: ../../../third_party/dart/runtime/tools/heapsnapshot/lib/src/cli.dart
+FILE: ../../../third_party/dart/runtime/tools/heapsnapshot/lib/src/completion.dart
+FILE: ../../../third_party/dart/runtime/tools/heapsnapshot/lib/src/console.dart
 FILE: ../../../third_party/dart/runtime/tools/heapsnapshot/lib/src/expression.dart
 FILE: ../../../third_party/dart/runtime/tools/heapsnapshot/lib/src/format.dart
 FILE: ../../../third_party/dart/runtime/tools/heapsnapshot/lib/src/load.dart