John McCutchan 67399264f1 [Impeller] Fixes for asymmetric stencil descriptors (flutter/engine#43535)
Fixes for asymmetric stencil descriptors

- Fix GLES implementation to properly set back and front face options in
the case that they aren't identical.
- Add write_mask to hash function.

https://github.com/flutter/flutter/issues/129855
2023-07-12 12:57:45 -07:00
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