Roll Flutter Engine from 6a4e675ab0b4 to ff04d2fdd12b (3 revisions) (#127630)

https://github.com/flutter/engine/compare/6a4e675ab0b4...ff04d2fdd12b

2023-05-25 flar@google.com Move checkerboard unit tests onto DisplayList mechanism (flutter/engine#41951)
2023-05-25 jacksongardner@google.com [Skwasm] Implement miscellaneous drawing APIs (flutter/engine#42324)
2023-05-25 skia-flutter-autoroll@skia.org Roll Fuchsia Mac SDK from X4uS4T6_J-VUh9M4A... to AgIKKqtBtb6RJnyI9... (flutter/engine#42326)

Also rolling transitive DEPS:
  fuchsia/sdk/core/mac-amd64 from X4uS4T6_J-VU to AgIKKqtBtb6R

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

-6a4e675ab0b4bc2adbfb2548c7c2c6c661708aa1
+ff04d2fdd12b130b5d57af9cd6497578c7533c7b

bin/internal/fuchsia-mac.version

-X4uS4T6_J-VUh9M4AOEc6qP0HLS0HpuLm1nDElf---0C
+AgIKKqtBtb6RJnyI9qwFKXdHvK0xJDQzWzQ30jwNJEYC