[automerger skipped] Add androidx.test libraries.
am: 16db363915 -s ours
am skip reason: change_id I44a3e0234494df7b39b10d0728ebecb95b48fbc1 with SHA1 f55aa44551 is in history

Change-Id: I8f29522c1ef512fd063be94cbda674205d1e873e