Roll Flutter Engine from 6d6b44886175 to 47a79306eed3 (2 revisions) (#134310)

https://github.com/flutter/engine/compare/6d6b44886175...47a79306eed3

2023-09-08 skia-flutter-autoroll@skia.org Roll Skia from c5e67d222f46 to 5b1e40fc0548 (5 revisions) (flutter/engine#45578)
2023-09-08 skia-flutter-autoroll@skia.org Roll ANGLE from 65ec697f4183 to 83030fed595b (1 revision) (flutter/engine#45577)

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

-6d6b44886175f4982dbe7aa42ffc39b654442b71
+47a79306eed39beff2b9702ca98d2fdabdd4f15e