Roll Dart SDK from d2ee73b2513c to 7aa8656d1dd8 (12 revisions) (#18533)

DEPS

@@ -34,7 +34,7 @@ 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': 'd2ee73b2513c1070c6d69f6d9a25c7dbc1aaa1da',
+  'dart_revision': '7aa8656d1dd8440ec9a96d4a71b6bdb37b9f769e',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py
@@ -74,7 +74,7 @@ vars = {
   'dart_pedantic_tag': 'v1.9.0',
   'dart_pool_tag': '86fbb2cde9bbc66c8d159909d2f65a5981ea5b50',
   'dart_protobuf_rev': '3746c8fd3f2b0147623a8e3db89c3ff4330de760',
-  'dart_pub_rev': '3606265962da4248d34d352aa3d170aae4496a90',
+  'dart_pub_rev': 'a4bc2dd08630f85a94f506eab037fcaaedb42222',
   'dart_pub_semver_tag': 'v1.4.4',
   'dart_quiver-dart_tag': '2.0.0+1',
   'dart_resource_rev': 'f8e37558a1c4f54550aa463b88a6a831e3e33cd6',

ci/licenses_golden/licenses_third_party

-Signature: 5533da765bee3caf81a763a019389266
+Signature: a6a5873eae766b8ba9c50098ac046c7b
 
 UNUSED LICENSES: