Roll engine c48774cfe09b..03d5f3c2d1e0 (3 commits) (#29082)

https://github.com/flutter/engine/compare/c48774cfe09b...03d5f3c2d1e0

git log c48774cfe09b7f286defb9e457a74c7e7028e11c..03d5f3c2d1e06e3949232d01233224fe18c196fb --no-merges --oneline
03d5f3c2d Clarify arguments to FlutterEngineOnVsync (flutter/engine#8093)
718329ce6 Android Embedding PR 17: Clarify AccessibilityBridge and move logic out of FlutterView. (flutter/engine#8061)
edfc0cfaa Android Embedding PR 16: Add touch support to FlutterView. (flutter/engine#8034)

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bin/internal/engine.version

-c48774cfe09b7f286defb9e457a74c7e7028e11c
+03d5f3c2d1e06e3949232d01233224fe18c196fb