Roll Flutter Engine from 5fcc16772cdd to 2b1b4b97f787 (1 revision) (#136404)

https://github.com/flutter/engine/compare/5fcc16772cdd...2b1b4b97f787

2023-10-11 skia-flutter-autoroll@skia.org Roll Skia from 6cc9f73ea54e to 2459d71707e0 (1 revision) (flutter/engine#46787)

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 jsimmons@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

-5fcc16772cdd65da53b8f7438c3f16bf09147936
+2b1b4b97f787ada35783a0b5ed191f0ed11e7728