Roll Dart SDK from 3405258 to d70fb6e (2 revisions) (#24454)

Author: skia-flutter-autoroll

DEPS

@@ -35,7 +35,7 @@ vars = {
   # Dart is: https://github.com/dart-lang/sdk/blob/master/DEPS.
   # You can use //tools/dart/create_updated_flutter_deps.py to produce
   # updated revision list of existing dependencies.
-  'dart_revision': '34052583a73c43f702b2e29e653ed9783d940004',
+  'dart_revision': 'd70fb6e63fe4dd365dafd906b850dcbc7c843aa0',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py
@@ -194,7 +194,7 @@ deps = {
    Var('dart_git') + '/dartdoc.git@9e61a4f11091aaa8998525a2692b14148dc24ab5',
 
   'src/third_party/dart/third_party/pkg/ffi':
-   Var('dart_git') + '/ffi.git@afb6b2c3a15c50e8f12ac15f368c7f1560f2d2f1',
+   Var('dart_git') + '/ffi.git@f3346299c55669cc0db48afae85b8110088bf8da',
 
   'src/third_party/dart/third_party/pkg/file':
    Var('dart_git') + '/external/github.com/google/file.dart/@0e09370f581ab6388d46fda4cdab66638c0171a1',

ci/licenses_golden/licenses_third_party

@@ -1,4 +1,4 @@
-Signature: 6682564d91f665cf7bd42ccb6a10e003
+Signature: 7540a121463d6c5df7d187b183620894
 
 UNUSED LICENSES: