Roll engine 3b944102a56e..bcde838d778e (6 commits) (#36020)

https://github.com/flutter/engine/compare/3b944102a56e...bcde838d778e

git log 3b944102a56e8f4182e6601113fc36538edf3de9..bcde838d778eecd39282cfb84ebba1d484bb7515 --no-merges --oneline
bcde838d7 Roll Wuffs and buildroot (flutter/engine#9791)
3b75979d3 fix ColorFilter.matrix constness (flutter/engine#9789)
3c9a22c77 Fall back to a fully qualified path to libapp.so if the library can not be loaded by name (flutter/engine#9762)
298a610c7 Roll fuchsia/sdk/core/mac-amd64 from XOXaWqvr4OuJ6O3uPefSwSFjZMaEmDHy5JQm3Q8Oc0wC to CDbRdGJ3bu-aWMCZqN5VzfQqIBwDGL2wfFodWABKdCIC (flutter/engine#9790)
833f6b4fc Roll src/third_party/skia f9fcf7ffa89a..7825d4983f90 (6 commits) (flutter/engine#9788)
1250c3773 Add comments to differentiate two cache paths (flutter/engine#9721)

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bin/internal/engine.version

-3b944102a56e8f4182e6601113fc36538edf3de9
+bcde838d778eecd39282cfb84ebba1d484bb7515