Add SDL2 & C-powered window handling compatibility. #1530

Job	Run time
cargo check (aarch64-android)	32s
cargo check (msrv) (wasm32)	18s
cargo clippy (windows-latest)	35s
cargo check (msrv) (windows-latest)	30s
cargo clippy (macos-latest)	30s
cargo clippy (wasm32)	27s
cargo check (msrv) (macos-latest)	26s
cargo clippy (ubuntu-latest)	36s
cargo doc	47s
cargo check (msrv) (ubuntu-latest)	32s
cargo fmt	23s
Prime LFS Cache	4s
cargo test (wasm32)	19s
typos	7s
cargo test (windows-latest)	1m 18s
cargo test (macos-latest)	45s
cargo test (ubuntu-latest)	2m 21s
	10m 30s

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