cpal

update ndk to 0.8 (#820) #763

Job	Run time
clippy-test	46s
cargo-publish	15s
rustfmt-check	5s
ubuntu-test	32s
asmjs-wasm32-test (asmjs-unknown-emscripten)	1m 1s
linux-check-and-test-armv7	1m 45s
asmjs-wasm32-test (wasm32-unknown-emscripten)	1m 9s
wasm32-bindgen-test (wasm32-unknown-unknown)	19s
wasm32-wasi-test (wasm32-wasi)	14s
android-check	41s
android-apk-build	49s
ios-build	4m 9s
macos-test	3m 54s
windows-test (x86_64)	4m 13s
wasm-beep-build	16s
windows-test (i686)	5m 20s
	25m 28s

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