ALSA: better card enumeration #922

Job	Run time
rustfmt-check	12s
android-check	46s
android-apk-build	1m 35s
asmjs-wasm32-test (wasm32-unknown-emscripten)	1m 0s
cargo-publish	0s
clippy-test	49s
linux-check-and-test-armv7	1m 37s
macos-test	1m 16s
ubuntu-test	29s
wasm32-bindgen-test (wasm32-unknown-unknown)	19s
wasm32-wasi-test (wasm32-wasi)	15s
windows-test (x86_64)	3m 5s
ios-build	2m 26s
windows-test (i686)	4m 27s
wasm-beep-build	38s
	18m 54s

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