7/ Add new test assets and helper methods

Also unify all android.support.annotation to androidx.annotation as per https://developer.android.com/jetpack/androidx/migrate guidelines

Incl. tests

Fixes: 255715397
Fixes: 259382394
Fixes: 259251690
Test: atest FlickerLibTest
Change-Id: I20b56e1b35dae81e89bf5e32d509e5d7afea3d64
6 files changed