Roll Dart SDK from 7e36e11608f3 to 638efc51d06f (2 revisions) (#40853)

Roll Dart SDK from 7e36e11608f3 to 638efc51d06f (2 revisions)

DEPS

diff --git a/DEPS b/DEPS
index 1566f33..4a4db0a 100644
--- a/DEPS
+++ b/DEPS
@@ -48,7 +48,7 @@
   # 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': '7e36e11608f300211ccabbdc7eee2b4788a5c174',
+  'dart_revision': '638efc51d06f3d6a156ba98482d1c93cb070ce78',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py
@@ -455,7 +455,7 @@
    Var('dart_git') + '/test_reflective_loader.git@c4c2d5c3f94a96f3fc79e9e28944fba391bc544c',
 
   'src/third_party/dart/third_party/pkg/tools':
-   Var('dart_git') + '/tools.git@9ce9f67c3ff2ac835ed0045e71d22188e2a19562',
+   Var('dart_git') + '/tools.git@fb2dada0f453a300659e6a2524fdcaed16056235',
 
   'src/third_party/dart/third_party/pkg/typed_data':
    Var('dart_git') + '/typed_data.git@f858046fb420cf644e7d8cb86b7893f2830d8a6c',

ci/licenses_golden/licenses_third_party

diff --git a/ci/licenses_golden/licenses_third_party b/ci/licenses_golden/licenses_third_party
index 350d30d..008f4f5 100644
--- a/ci/licenses_golden/licenses_third_party
+++ b/ci/licenses_golden/licenses_third_party
@@ -1,4 +1,4 @@
-Signature: cd06fc0e4cc108fe56186369fd477d06
+Signature: d697d9535d35e549067f5b368e0e1bb6
 
 ====================================================================================================
 LIBRARY: angle