IsValid methods for AudioEmitter and AudioListener #22

Job	Run time
build (windows-2019, x64-Debug, amd64)	3m 10s
build (windows-2019, x64-Release, amd64)	1m 41s
build (windows-2019, x64-Debug-Clang, amd64)	3m 41s
build (windows-2019, x64-Release-Clang, amd64)	3m 10s
build (windows-2022, x64-Debug, amd64)	2m 36s
build (windows-2022, x64-Release, amd64)	2m 35s
build (windows-2022, x64-Debug-Clang, amd64)	2m 53s
build (windows-2022, x64-Release-Clang, amd64)	3m 48s
build (windows-2019, x86-Debug, amd64_x86)	2m 45s
build (windows-2019, x86-Release, amd64_x86)	1m 57s
build (windows-2019, x86-Debug-Clang, amd64_x86)	2m 9s
build (windows-2019, x86-Release-Clang, amd64_x86)	3m 18s
build (windows-2022, x86-Debug, amd64_x86)	4m 1s
build (windows-2022, x86-Release, amd64_x86)	2m 13s
build (windows-2022, x86-Debug-Clang, amd64_x86)	3m 59s
build (windows-2022, x86-Release-Clang, amd64_x86)	1m 41s
build (windows-2022, arm64-Debug, amd64_arm64)	2m 31s
build (windows-2022, arm64-Release, amd64_arm64)	1m 36s
build (windows-2022, arm64ec-Debug, amd64_arm64)	4m 28s
build (windows-2022, arm64ec-Release, amd64_arm64)	1m 48s
	56m 0s

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