Roll Flutter Engine from d0f9329c5ce4 to a56f346dbbf9 (6 revisions) (#141451)

https://github.com/flutter/engine/compare/d0f9329c5ce4...a56f346dbbf9

2024-01-12 skia-flutter-autoroll@skia.org Roll Skia from 22fa87f32944 to 7484d4a2514e (1 revision) (flutter/engine#49757)
2024-01-12 skia-flutter-autoroll@skia.org Roll Skia from 1871595fecb3 to 22fa87f32944 (1 revision) (flutter/engine#49755)
2024-01-12 skia-flutter-autoroll@skia.org Roll Dart SDK from f61f7d2f57c5 to 042dbc146a37 (1 revision) (flutter/engine#49752)
2024-01-12 skia-flutter-autoroll@skia.org Roll Dart SDK from bff80f6c56de to f61f7d2f57c5 (1 revision) (flutter/engine#49748)
2024-01-12 skia-flutter-autoroll@skia.org Roll Skia from 2bef4f0f8058 to 1871595fecb3 (1 revision) (flutter/engine#49747)
2024-01-12 skia-flutter-autoroll@skia.org Roll Skia from e9de42588e54 to 2bef4f0f8058 (2 revisions) (flutter/engine#49745)

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/flutter-engine-flutter-autoroll
Please CC bdero@google.com,rmistry@google.com,zra@google.com on the revert to ensure that a human
is aware of the problem.

To file a bug in Flutter: 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

bin/internal/engine.version

-d0f9329c5ce46c56d2c883472dd01eb749a6f860
+a56f346dbbf95175de0e63ec47cec938787c67c1