Add SDL2 & C-powered window handling compatibility. #1532

Job	Run time
cargo check (msrv) (windows-latest)	1m 50s
cargo check (msrv) (wasm32)	38s
cargo check (msrv) (macos-latest)	47s
cargo check (msrv) (ubuntu-latest)	51s
cargo check (aarch64-android)	1m 14s
cargo clippy (windows-latest)	51s
cargo clippy (macos-latest)	45s
cargo clippy (ubuntu-latest)	32s
cargo clippy (wasm32)	26s
cargo doc	1m 4s
Prime LFS Cache	7s
cargo fmt	34s
cargo test (wasm32)	30s
typos	4s
cargo test (windows-latest)	1m 49s
cargo test (macos-latest)	41s
cargo test (ubuntu-latest)	1m 44s
	14m 27s

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