Roll Flutter Engine from 78584fec8e52 to 39ae00bf5328 (2 revisions) (#139570)

https://github.com/flutter/engine/compare/78584fec8e52...39ae00bf5328

2023-12-05 skia-flutter-autoroll@skia.org Roll Skia from 3040f78eeb71 to 7901100ba2d9 (3 revisions) (flutter/engine#48677)
2023-12-05 98614782+auto-submit[bot]@users.noreply.github.com Reverts "Bump actions/labeler from 4.3.0 to 5.0.0" (flutter/engine#48676)

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 chinmaygarde@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

-78584fec8e5228df3ff4aae9f1a9df95ea11cd73
+39ae00bf5328c28a2fe8d448bccda2138a41833b