Roll Flutter Engine from 8a42bfc80e3a to 601f0c173b8e (1 revision) (#130544)

https://github.com/flutter/engine/compare/8a42bfc80e3a...601f0c173b8e

2023-07-13 jason-simmons@users.noreply.github.com Fix a clang-tidy warning about a potentially nil value in the editingState dictionary (flutter/engine#43660)

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://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

-8a42bfc80e3ad61a2da11f084bddf4b436778ff4
+601f0c173b8ea8ed6484b24a960d3b60b414fc66