Roll Flutter Engine from c62bcff5b809 to bf979d220283 (1 revision) (#140910)

https://github.com/flutter/engine/compare/c62bcff5b809...bf979d220283

2024-01-03 john@johnmccutchan.com Fix a crash in the new SurfaceProducer external texture (flutter/engine#49496)

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

-c62bcff5b809a9973f4d551acff40fb69dc8e170
+bf979d22028360c3ff3c7bd08a0b3869ac79d51b