Build demos

feat: extract on-device review app and tools to :ApiDemos:reviewer module #5865

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Run time

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Job	Run time
build-Snippets	2m 56s
build-tutorials	1m 1s
build-ApiDemos	4m 7s
build-WearOS	1m 40s
build-FireMarkers	2m 59s
test	5m 9s
	17m 52s