Roll Flutter Engine from 7a4a267d8ad0 to b7fced37086b (3 revisions) (#127911)

https://github.com/flutter/engine/compare/7a4a267d8ad0...b7fced37086b

2023-05-31 skia-flutter-autoroll@skia.org Roll Skia from 78f3a9a4587c to 6920730bc2e8 (1 revision) (flutter/engine#42441)
2023-05-31 skia-flutter-autoroll@skia.org Roll Skia from 870e249c99a7 to 78f3a9a4587c (1 revision) (flutter/engine#42440)
2023-05-31 skia-flutter-autoroll@skia.org Roll Fuchsia Mac SDK from BPfBea46iVvtlNBnP... to WbvKb2sKXw0MUnSsC... (flutter/engine#42439)

Also rolling transitive DEPS:
  fuchsia/sdk/core/mac-amd64 from BPfBea46iVvt to WbvKb2sKXw0M

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 jonahwilliams@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

-7a4a267d8ad0a7fa9d99ce8cf7a5207fe7e1a366
+b7fced37086bf4794f7b8d970c5e8836054c90b2

bin/internal/fuchsia-mac.version

-BPfBea46iVvtlNBnPvB0s1wMQt7HivyX1A6WWEfTZYkC
+WbvKb2sKXw0MUnSsCeDe1a6qi27mVDrUXa7qdYqggaAC