Roll Flutter Engine from dff18479ee48 to 5374988a500c (3 revisions) (#127903)

https://github.com/flutter/engine/compare/dff18479ee48...5374988a500c

2023-05-30 zanderso@users.noreply.github.com Enables bugprone-unchecked-optional-access for some files (flutter/engine#42428)
2023-05-30 zanderso@users.noreply.github.com Revert "Move linux clang tidy to engine_v2." (flutter/engine#42434)
2023-05-30 skia-flutter-autoroll@skia.org Roll Skia from fed417995ba9 to 870e249c99a7 (14 revisions) (flutter/engine#42435)

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

-dff18479ee48cd23d0e94176bfea5a2916025b78
+5374988a500c1323ee1a092359b88922100752c5