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

…143427)

flutter/engine@0849250...3af336b

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.

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bin/internal/engine.version

@@ -1 +1 @@
-0849250a141981bcd4f948cd392ba725ec948ef9
+3af336bfb2dfd9080c028fadcafca39a06e20e43