Roll Flutter Engine from da3721adba65 to b4bf592279d6 (2 revisions) (#131519)

https://github.com/flutter/engine/compare/da3721adba65...b4bf592279d6

2023-07-28 jason-simmons@users.noreply.github.com Set the required Android API level when Vulkan validation layers are automatically enabled for android_debug_unopt_arm64 builds (flutter/engine#44116)
2023-07-28 skia-flutter-autoroll@skia.org Roll Dart SDK from e9bdbe308478 to 69c96c505f05 (1 revision) (flutter/engine#44118)

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

-da3721adba6563ded903f156b0e83ee91552a571
+b4bf592279d611e7df34f868cae929186d854729