Roll engine 0f6229ab1d39..3b944102a56e (3 commits) (#36000)

https://github.com/flutter/engine/compare/0f6229ab1d39...3b944102a56e

git log 0f6229ab1d3915bac6967f08a8074d58ebfeb656..3b944102a56e8f4182e6601113fc36538edf3de9 --no-merges --oneline
3b944102a Un-deprecated FlutterViewController's binaryMessenger. (flutter/engine#9767)
7e65b81cc Roll src/third_party/dart 09fc76bc51..24725a8559 (43 commits)
a03e74743 Add hooks for InputConnection lock and unlocking (flutter/engine#9727)

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

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bin/internal/engine.version

-0f6229ab1d3915bac6967f08a8074d58ebfeb656
+3b944102a56e8f4182e6601113fc36538edf3de9