Roll engine 934772dd8772..0523870e0bc6 (6 commits) (#31458)

https://github.com/flutter/engine/compare/934772dd8772...0523870e0bc6

git log 934772dd877210443a65fe1d0eec542b3d559b71..0523870e0bc6f20101aa6e42e9e3fdf3adf513f0 --no-merges --oneline
0523870e0 Add tests from framework (flutter/engine#8692)
ed1f3fd99 Change Vertices.indices to use a Uint16 list to more accurately reflect Skia's API (flutter/engine#8657)
4f2fd84cb Revert Rect/RRect 64 bit (flutter/engine#8690)
6dc5dcad3 Revert "Remove unused Settings::ToString. (#8642)" (flutter/engine#8689)
9fa733678 fix toString (flutter/engine#8688)
c12315273 Make Rect and RRect use 64 bit doubles, and make them const-able (flutter/engine#8565)

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bin/internal/engine.version

-934772dd877210443a65fe1d0eec542b3d559b71
+0523870e0bc6f20101aa6e42e9e3fdf3adf513f0