Roll Flutter Engine from bec0dacaae41 to 6e71c3642abf (2 revisions) (#138956)

https://github.com/flutter/engine/compare/bec0dacaae41...6e71c3642abf

2023-11-23 skia-flutter-autoroll@skia.org Roll Skia from 5606ef899116 to fc9c5337e568 (1 revision) (flutter/engine#48339)
2023-11-23 skia-flutter-autoroll@skia.org Roll Fuchsia Linux SDK from IK4xyRtZkDwqT6pXA... to 4CZFCL5oL042nQihC... (flutter/engine#48338)

Also rolling transitive DEPS:
  fuchsia/sdk/core/linux-amd64 from IK4xyRtZkDwq to 4CZFCL5oL042

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

-bec0dacaae419e798056f2eebdf9b69e80c252df
+6e71c3642abf21144cc04a219def1155fb5fbe41

bin/internal/fuchsia-linux.version

-IK4xyRtZkDwqT6pXAFvX-JUnOhqlqASQWGy3ecKGdesC
+4CZFCL5oL042nQihCihH0umxQpGhGvfh3vgi9yuhtcsC