Roll Flutter Engine from 6f499ecea657 to 9b610ecda771 (1 revision) (#139063)

https://github.com/flutter/engine/compare/6f499ecea657...9b610ecda771

2023-11-27 matej.knopp@gmail.com Reduce number of surfaces required when presenting platform views (flutter/engine#43301)

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 jacksongardner@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

-6f499ecea6570f1b7df5c7813ef9e4456d56c426
+9b610ecda7715ab81d8917a612942a52415e64d7