Roll Flutter Engine from 6752398c2f54 to a8d8fbbcef22 (1 revision) (#140274)

https://github.com/flutter/engine/compare/6752398c2f54...a8d8fbbcef22

2023-12-16 skia-flutter-autoroll@skia.org Roll Skia from d231faf34f8a to 35d0d7eb991c (1 revision) (flutter/engine#49137)

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 jsimmons@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

-6752398c2f547a72ff71ad6e03ca496e6dd6444b
+a8d8fbbcef22ec68e9c57495a409f585b379700d