Update Dart revision for 3.35 stable release (flutter#173582)

Updates Dart has for 3.35 stable release to Dart 3.9 hash -- https://dart.googlesource.com/sdk/+/54588cb8088890ea08fe1a31b95efe478a4609b5.

Steps I took:

1. Updated hash to desired version.
2. Run `engine/src/tools/dart/create_updated_flutter_deps.py -f DEPS` to update any Dart dependencies if needed (none updated).
3. Updated `engine/src/flutter/ci/licenses_golden/licenses_dart` with diff produced in error from https://ci.chromium.org/ui/p/flutter/builders/try/Linux%20linux_license/36032/overview build failure.

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Author: camsim99

DEPS

@@ -56,7 +56,7 @@ 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': 'a4e60e5add75b3d06f380aad73ca660a719fa738',
+  'dart_revision': '54588cb8088890ea08fe1a31b95efe478a4609b5',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py

engine/src/flutter/ci/licenses_golden/licenses_dart

@@ -1,4 +1,4 @@
-Signature: 9e71853011444b1c40e5780c309930f4
+Signature: 90c64afcbe53b95cb9488d51b74ef207
 
 ====================================================================================================
 LIBRARY: dart
@@ -4894,7 +4894,7 @@ Exhibit B - "Incompatible With Secondary Licenses" Notice
   This Source Code Form is "Incompatible With Secondary Licenses", as
   defined by the Mozilla Public License, v. 2.0.
 
-You may obtain a copy of this library's Source Code Form from: https://dart.googlesource.com/sdk/+/3ad640094c386c2c63be7c6a2bb3256c5ad5726c
+You may obtain a copy of this library's Source Code Form from: https://dart.googlesource.com/sdk/+/54588cb8088890ea08fe1a31b95efe478a4609b5
 /third_party/fallback_root_certificates/
 
 ====================================================================================================