Add activity testapp to FLAN BuildType
Add activity testapp to FLAN BuildType

Ensure that developers using the FLAN
BuildType have access to the activity
testapp.

Test: ./gradlew bOS
Change-Id: Id5b1254685ef7e3f67ab0849130998cafe962d3c

androidx/androidx,androidx/androidx,AndroidX/androidx,AndroidX/androidx,androidx/androidx,androidx/androidx,AndroidX/androidx,androidx/androidx,AndroidX/androidx,AndroidX/androidx,androidx/androidx,androidx/androidx,AndroidX/androidx,androidx/androidx,AndroidX/androidx,androidx/androidx,AndroidX/androidx,AndroidX/androidx,AndroidX/androidx,androidx/androidx