Roll Flutter Engine from 98b036ae708e to 5b2cc9d9b8fe (2 revisions) (#134080)

https://github.com/flutter/engine/compare/98b036ae708e...5b2cc9d9b8fe

2023-09-05 ychris@google.com Fix iOS unittests leak in shared.invoke method channel that causes crash (flutter/engine#45416)
2023-09-05 skia-flutter-autoroll@skia.org Roll Skia from 7e80aedd05b6 to 2b9fc6a2c250 (1 revision) (flutter/engine#45465)

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

-98b036ae708ec31c9c6c6efefaf8c6faef99de6f
+5b2cc9d9b8fe2f8bd24c8fc3c057090753902cb9