Roll Flutter Engine from 427ceaf089bd to 3a1b12a2fa09 (1 revision) (#130577)

https://github.com/flutter/engine/compare/427ceaf089bd...3a1b12a2fa09

2023-07-14 kustermann@google.com Use utf8.encode() instead of longer const Utf8Encoder.convert() (flutter/engine#43675)

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

-427ceaf089bd9f85bb140649e12cbf9a3634ff1b
+3a1b12a2fa09c04e7053ff687970e3fd13829f1d