Roll Dart SDK from 1835098e9ae8 to 2a422d5af6c8 (1 revision) (flutter#35152)

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': '1835098e9ae82d5625b8dea4497d71f163ce8724',
+  'dart_revision': '2a422d5af6c8e7e9c6a3c37dcf41f905378a3218',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py