Sort declarations in pkg/dartdev/test/commands/migrate_test.dart
Sort declarations in pkg/dartdev/test/commands/migrate_test.dart

Change-Id: I1edd2837d6e3040acf288641a4dc5a5ff4026aac
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/141851
Reviewed-by: Mike Fairhurst <2002604e76601be549134505841fea93de80dc45@google.com>

dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk