Rework OnboardApp to adjust to new architecture #6880

Job	Run time
yamllint	6s
lockfiles	5m 39s
ktlint	3m 45s
pr_build_release	17m 57s
lint	11m 24s
pr_build	17m 2s
Unit Tests	9m 13s
Screenshot Tests	15m 51s
Instrumentation Tests (34, x86_64, wearos_small_round, android-wear, :wear:connectedDebugAndroidT...	12m 44s
Instrumentation Tests (23, x86_64, Nexus 5, google_apis, :app:connectedFullDebugAndroidTest :app:...	23m 36s
Instrumentation Tests (33, x86_64, automotive_1024p_landscape, android-automotive, :automotive:co...	16m 0s
Instrumentation Tests (26, x86, wearos_square, android-wear, :wear:connectedDebugAndroidTest :com...	17m 33s
Instrumentation Tests (36, x86_64, pixel_7, google_apis, :app:connectedFullDebugAndroidTest :app:...	19m 49s
Instrumentation Tests (34, 34-ext9, x86_64, automotive_1024p_landscape, android-automotive, :auto...	17m 55s
Publish Tests Results	17s
	3h 8m 51s

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