Roll Dart SDK from aada0a67f81e to 344a7d12b413 (1 revision) (#35181)

Author: skia-flutter-autoroll

DEPS

@@ -36,7 +36,7 @@ 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': 'aada0a67f81e3532921488ba41de4e3d69a73be1',
+  'dart_revision': '344a7d12b41317a9ee0b388caad7939f06f309b9',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py