Roll Flutter Engine from 5e671d5c90f9 to b71b366e3de3 (4 revisions) (#134676)

https://github.com/flutter/engine/compare/5e671d5c90f9...b71b366e3de3

2023-09-13 matanlurey@users.noreply.github.com Do not run real processes in `clang_tidy_test.dart` (flutter/engine#45748)
2023-09-13 30870216+gaaclarke@users.noreply.github.com [Impeller] Adds test to verify wide gamut indexed png decompression fix for Skia. (flutter/engine#45399)
2023-09-13 skia-flutter-autoroll@skia.org Roll Skia from 284c333d7eb2 to 78d18d509475 (2 revisions) (flutter/engine#45769)
2023-09-13 skia-flutter-autoroll@skia.org Roll Skia from 3ff43577d04b to 284c333d7eb2 (1 revision) (flutter/engine#45768)

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

-5e671d5c90f9088c7cad498dc8ecfbab8d03336a
+b71b366e3de3be6720b193086271a3934ead3901