Roll Flutter Engine from c5854a6b3658 to 9f2cf5c99b0f (4 revisions) (#133616)

https://github.com/flutter/engine/compare/c5854a6b3658...9f2cf5c99b0f

2023-08-29 skia-flutter-autoroll@skia.org Roll Skia from 8a2754a1ae60 to e6eb56d9b074 (3 revisions) (flutter/engine#45248)
2023-08-29 matanlurey@users.noreply.github.com Refactor `Stopwatch` into `StopwatchVisualizer` and `SkStopwatchVisualizer` (flutter/engine#45200)
2023-08-29 zanderso@users.noreply.github.com Roll buildroot (flutter/engine#45249)
2023-08-29 bdero@google.com [Impeller] Add GetDefaultDepthStencil to capabilities. (flutter/engine#45240)

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 aaclarke@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

-c5854a6b3658366d4894c9ed95a70e6c2d71c195
+9f2cf5c99b0fc0282db88846c1d97e6bc3560d28