IsValid methods for AudioEmitter and AudioListener #20

Job	Run time
build (windows-2019, x64-Debug, amd64)	3m 9s
build (windows-2019, x64-Release, amd64)	3m 2s
build (windows-2019, x64-Debug-Clang, amd64)	2m 23s
build (windows-2019, x64-Release-Clang, amd64)	2m 6s
build (windows-2022, x64-Debug, amd64)	3m 19s
build (windows-2022, x64-Release, amd64)	1m 59s
build (windows-2022, x64-Debug-Clang, amd64)	2m 15s
build (windows-2022, x64-Release-Clang, amd64)	2m 23s
build (windows-2019, x86-Debug, amd64_x86)	2m 14s
build (windows-2019, x86-Release, amd64_x86)	2m 34s
build (windows-2019, x86-Debug-Clang, amd64_x86)	3m 25s
build (windows-2019, x86-Release-Clang, amd64_x86)	2m 43s
build (windows-2022, x86-Debug, amd64_x86)	59s
build (windows-2022, x86-Release, amd64_x86)	1m 5s
build (windows-2022, x86-Debug-Clang, amd64_x86)	2m 7s
build (windows-2022, x86-Release-Clang, amd64_x86)	1m 29s
build (windows-2022, arm64-Debug, amd64_arm64)	2m 34s
build (windows-2022, arm64-Release, amd64_arm64)	3m 34s
build (windows-2022, arm64ec-Debug, amd64_arm64)	4m 20s
build (windows-2022, arm64ec-Release, amd64_arm64)	3m 12s
	50m 52s

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