Roll Flutter Engine from 47a79306eed3 to b2cb1d271a88 (5 revisions) (#134313)

https://github.com/flutter/engine/compare/47a79306eed3...b2cb1d271a88

2023-09-08 skia-flutter-autoroll@skia.org Roll Skia from 5181fcf6184e to 948959b6b53e (4 revisions) (flutter/engine#45583)
2023-09-08 gspencergoog@users.noreply.github.com Remove usage of the Jazzy document formatter for Objective C, in favor of Doxygen. (flutter/engine#45561)
2023-09-08 skia-flutter-autoroll@skia.org Roll ANGLE from 83030fed595b to a507f31285b8 (1 revision) (flutter/engine#45582)
2023-09-08 skia-flutter-autoroll@skia.org Roll Skia from 5b1e40fc0548 to 5181fcf6184e (2 revisions) (flutter/engine#45580)
2023-09-08 matanlurey@users.noreply.github.com Document and provide small cleanups to `CommandPoolVk`. (flutter/engine#45558)

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

-47a79306eed39beff2b9702ca98d2fdabdd4f15e
+b2cb1d271a881d3b8ba583522bcc257ac64352d6