Roll Dart SDK from 02971d1fcc61 to 1e0fec6e48cf (1 revision) (#24370)

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': '02971d1fcc6167cc6bc6282b5a8b7183c1f12bc5',
+  'dart_revision': '1e0fec6e48cf89f46973af38a5c2de4bc760a135',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py

ci/licenses_golden/licenses_third_party

-Signature: cbb16e1d618f21e37921223199837eb5
+Signature: c473d0d4c23fe01336bbbdab7fb8c5f7
 
 UNUSED LICENSES: