Roll Dart SDK from 27e71f19c144 to fe8bb0565a30 (2 revisions) (#41336)

https://dart.googlesource.com/sdk.git/+log/27e71f19c144..fe8bb0565a30

2023-04-19 [email protected] Version 3.1.0-20.0.dev
2023-04-19 [email protected] Version 3.1.0-19.0.dev

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/dart-sdk-flutter-engine
Please CC [email protected],[email protected],[email protected],[email protected] on the revert to ensure that a human
is aware of the problem.

To file a bug in Flutter Engine: https://github.com/flutter/flutter/issues/new/choose

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

Author: skia-flutter-autoroll

DEPS

@@ -47,7 +47,7 @@ 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': '27e71f19c144b328a49510c9e578fa42f9edf021',
+  'dart_revision': 'fe8bb0565a30584c146d4797aa05df723ffb64a3',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py
@@ -355,7 +355,7 @@ deps = {
    Var('dart_git') + '/csslib.git@44bfbe32ca4a633a51a174b4bc889c64f95792b0',
 
   'src/third_party/dart/third_party/pkg/dart_style':
-   Var('dart_git') + '/dart_style.git@33efb2560c62b7b7bf330009cd757495b0e1456a',
+   Var('dart_git') + '/dart_style.git@6c9bc10cf2dc6496b2ce863c8d614aa0781abf90',
 
   'src/third_party/dart/third_party/pkg/dartdoc':
    Var('dart_git') + '/dartdoc.git@a0755f5f59fbfeb46e694bcf67c2832e3a67255e',