IsValid methods for AudioEmitter and AudioListener #21

Job	Run time
build (windows-2019, x64-Debug, amd64)	1m 59s
build (windows-2019, x64-Release, amd64)	1m 57s
build (windows-2019, x64-Debug-Clang, amd64)	2m 44s
build (windows-2019, x64-Release-Clang, amd64)	2m 9s
build (windows-2022, x64-Debug, amd64)	4m 41s
build (windows-2022, x64-Release, amd64)	4m 12s
build (windows-2022, x64-Debug-Clang, amd64)	2m 49s
build (windows-2022, x64-Release-Clang, amd64)	2m 59s
build (windows-2019, x86-Debug, amd64_x86)	1m 16s
build (windows-2019, x86-Release, amd64_x86)	1m 43s
build (windows-2019, x86-Debug-Clang, amd64_x86)	2m 36s
build (windows-2019, x86-Release-Clang, amd64_x86)	2m 15s
build (windows-2022, x86-Debug, amd64_x86)	2m 40s
build (windows-2022, x86-Release, amd64_x86)	4m 53s
build (windows-2022, x86-Debug-Clang, amd64_x86)	2m 34s
build (windows-2022, x86-Release-Clang, amd64_x86)	2m 21s
build (windows-2022, arm64-Debug, amd64_arm64)	54s
build (windows-2022, arm64-Release, amd64_arm64)	51s
build (windows-2022, arm64ec-Debug, amd64_arm64)	4m 43s
build (windows-2022, arm64ec-Release, amd64_arm64)	1m 25s
	51m 41s

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