cpal

Fix runtime errors on Android targets #747

Job	Run time
rustfmt-check	8s
clippy-test	1m 22s
android-apk-build	2m 20s
android-check	1m 10s
asmjs-wasm32-test (asmjs-unknown-emscripten)	1m 46s
cargo-publish	0s
asmjs-wasm32-test (wasm32-unknown-emscripten)	1m 27s
ios-build	6m 59s
linux-check-and-test-armv7	2m 32s
macos-test	2m 4s
ubuntu-test	1m 2s
wasm32-bindgen-test (wasm32-unknown-unknown)	37s
wasm32-wasi-test (wasm32-wasi)	19s
wasm-beep-build	23s
windows-test (x86_64)	14m 38s
windows-test (i686)	11m 24s
	48m 11s

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