Roll Flutter Engine from cc9362752996 to ffc84af47827 (2 revisions) (#141074)

https://github.com/flutter/engine/compare/cc9362752996...ffc84af47827

2024-01-07 skia-flutter-autoroll@skia.org Roll Skia from 98240694c57d to e2bc77be480c (1 revision) (flutter/engine#49582)
2024-01-07 skia-flutter-autoroll@skia.org Roll Skia from 388ef1be2bb8 to 98240694c57d (1 revision) (flutter/engine#49581)

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 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

-cc9362752996b6030dcdac8d0dcd75e8a6e95d9b
+ffc84af4782704dd3b7c7e89294e30c0e5fb9d92