Roll Flutter Engine from 340936f7c03c to a4d4ad9dae1a (1 revision) (#127772)

https://github.com/flutter/engine/compare/340936f7c03c...a4d4ad9dae1a

2023-05-28 skia-flutter-autoroll@skia.org Roll Skia from 643fae1b1559 to f9794b94c518 (1 revision) (flutter/engine#42389)

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://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

bin/internal/engine.version

-340936f7c03cd16af40bcdc1f152238324895af8
+a4d4ad9dae1a3564d33a346c98f9517ca1013ec2