Roll Flutter Engine from 71600d89aa3f to 2a8471f188cd (2 revisions) (#137129)

https://github.com/flutter/engine/compare/71600d89aa3f...2a8471f188cd

2023-10-24 skia-flutter-autoroll@skia.org Roll Skia from 8632561c828a to 82f665328e96 (1 revision) (flutter/engine#47251)
2023-10-24 chinmaygarde@google.com [Impeller] Update shader pipeline image with a chart. (flutter/engine#47250)

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 jimgraham@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

-71600d89aa3f71865c4bbaa07287f396cd3443fa
+2a8471f188cd5f7c7e65cd1e6f632e50c9e827db