Roll Flutter Engine from 683d7dc38928 to b5f18218969b (1 revision) (#133401)

https://github.com/flutter/engine/compare/683d7dc38928...b5f18218969b

2023-08-27 matanlurey@users.noreply.github.com Use `SkTextBlob::bounds` instead of `TextFrame::getBounds()`. (flutter/engine#45148)

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 jimgraham@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

-683d7dc389284953cefbc52a63aada286f0430a6
+b5f18218969b4294bc14ed5316f2fe0a35267a55