Roll Dart SDK from 3b9af2825d47 to fac111d4acb3 (2 revisions) (flutter/engine#44315)

https://dart.googlesource.com/sdk.git/+log/3b9af2825d47..fac111d4acb3

2023-08-03 dart-internal-merge@dart-ci-internal.iam.gserviceaccount.com Version 3.2.0-32.0.dev
2023-08-03 dart-internal-merge@dart-ci-internal.iam.gserviceaccount.com Version 3.2.0-31.0.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 dart-vm-team@google.com,jacksongardner@google.com 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

DEPS

@@ -53,7 +53,7 @@ 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': '3b9af2825d47613a1c5b40a9617ad0506dd39f52',
+  'dart_revision': 'fac111d4acb325fdddd2746126f0e1fd09323600',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py
@@ -70,7 +70,7 @@ vars = {
   'dart_protobuf_rev': 'd9e8a31d0e4124130fc494b6bdb66e19dbd4770d',
   'dart_pub_rev': '42819a1e10f803eb7f6296692c5a976e1c647360',
   'dart_root_certificates_rev': '692f6d6488af68e0121317a9c2c9eb393eb0ee50',
-  'dart_tools_rev': 'ba55fd692377ec398b61198c602c5302bf65226d',
+  'dart_tools_rev': 'af3fc996d69b2e790a94f4e9f3cd303a2f29d121',
   'dart_watcher_rev': '7457413060ed7403b90b01533a61bd959932122e',
   'dart_webdev_rev': '5081dff0952eb7163f98a508d7b2d976c1573c55',
   'dart_webkit_inspection_protocol_rev': '39a3c297ff573635e7936b015ce4f3466e4739d6',