Roll Flutter Engine from 0849250a1419 to 3af336bfb2df (2 revisions) (#143427)

https://github.com/flutter/engine/compare/0849250a1419...3af336bfb2df

2024-02-14 jason-simmons@users.noreply.github.com In run_tests, use the regular path to the Vulkan library if lib.unstripped does not exist (flutter/engine#50629)
2024-02-14 skia-flutter-autoroll@skia.org Roll Dart SDK from a8303c0bf1b4 to 032323fa534b (1 revision) (flutter/engine#50631)

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 jsimmons@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://issues.skia.org/issues/new?component=1389291&template=1850622

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https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

bin/internal/engine.version

-0849250a141981bcd4f948cd392ba725ec948ef9
+3af336bfb2dfd9080c028fadcafca39a06e20e43