Roll Flutter Engine from a8d7d8125382 to 5e671d5c90f9 (1 revision) (#134650)

https://github.com/flutter/engine/compare/a8d7d8125382...5e671d5c90f9

2023-09-13 whesse@google.com Roll devtools from acbc179425b4596b7c2ba7d9c4263077f2e18098 to adfb08… (flutter/engine#45766)

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 bdero@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://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

bin/internal/engine.version

-a8d7d812538288fbf754c5a2b02c1bfad356356b
+5e671d5c90f9088c7cad498dc8ecfbab8d03336a