Roll Dart SDK from 0ac840ba1f0b to 31ddd6924103 (5 revisions) (#51924)

https://dart.googlesource.com/sdk.git/+log/0ac840ba1f0b..31ddd6924103

2024-04-04 dart-internal-merge@dart-ci-internal.iam.gserviceaccount.com Version 3.5.0-24.0.dev
2024-04-04 dart-internal-merge@dart-ci-internal.iam.gserviceaccount.com Version 3.5.0-23.0.dev
2024-04-04 dart-internal-merge@dart-ci-internal.iam.gserviceaccount.com Version 3.5.0-22.0.dev
2024-04-04 dart-internal-merge@dart-ci-internal.iam.gserviceaccount.com Version 3.5.0-21.0.dev
2024-04-04 dart-internal-merge@dart-ci-internal.iam.gserviceaccount.com Version 3.5.0-20.0.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,matanl@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://issues.skia.org/issues/new?component=1389291&template=1850622

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md
https://dart.googlesource.com/external/github.com/flutter/engine/+/c59074f2569ae64fd65d787ed3dfc6ce51304eb3
diff --git a/DEPS b/DEPS
index afa492d..4c68524 100644
--- a/DEPS
+++ b/DEPS
@@ -291,7 +291,7 @@
 deps = {
   'engine/src': 'https://github.com/flutter/buildroot.git' + '@' + 'dcd71b5b237e1e58f2ad8a7e51bead0c2a3755a9',
 
-  'engine/src/flutter': Var('flutter_git') + '/mirrors/engine' + '@' + '7feef43d2c032bf3ecb93b353fa882db9d5c1cb2',
+  'engine/src/flutter': Var('flutter_git') + '/mirrors/engine' + '@' + 'c59074f2569ae64fd65d787ed3dfc6ce51304eb3',
 
   'engine/src/third_party/dart': Var('dart_git') + '/sdk' + '@' + 'df707ac85e9a81b73c80638b759aede6be80ebbb',
 
diff --git a/commits.json b/commits.json
index 6762257..066b4de 100644
--- a/commits.json
+++ b/commits.json
@@ -1,5 +1,5 @@
 {
-  "engine/src/flutter":"7feef43d2c032bf3ecb93b353fa882db9d5c1cb2",
+  "engine/src/flutter":"c59074f2569ae64fd65d787ed3dfc6ce51304eb3",
   "engine/src/third_party/dart":"df707ac85e9a81b73c80638b759aede6be80ebbb",
   "flutter":"9c6fcdac6f7000a88a16d330fafe51c95ac6a642"
 }
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