Roll Flutter Engine from 6d798393a15a to 34ece7a4abac (1 revision) (#125516)

https://github.com/flutter/engine/compare/6d798393a15a...34ece7a4abac

2023-04-25 godofredoc@google.com Double zip FlutterMacOS.dSYM.zip. (flutter/engine#41425)

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://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

-6d798393a15ae4c90ab1b034b838f8505cb2796e
+34ece7a4abaca9914096f0e13cb326093ad82e7f