Add SDL2 & C-powered window handling compatibility. #1524

Job	Run time
cargo check (msrv) (wasm32)	16s
cargo check (msrv) (windows-latest)	29s
cargo check (aarch64-android)	37s
cargo clippy (windows-latest)	24s
cargo check (msrv) (macos-latest)	24s
cargo clippy (wasm32)	18s
cargo clippy (macos-latest)	24s
cargo check (msrv) (ubuntu-latest)	30s
cargo doc	16s
cargo clippy (ubuntu-latest)	36s
cargo fmt	35s
Prime LFS Cache	10s
cargo test (wasm32)	26s
typos	5s
cargo test (windows-latest)	50s
cargo test (macos-latest)	26s
cargo test (ubuntu-latest)	1m 9s
	7m 55s

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