Merge "Add 'preparers' template to cts-automated config." am: d31e3ca26c am: 83166adb29 am: 8416492b9a

Original change: https://android-review.googlesource.com/c/platform/cts/+/1516750

Change-Id: I7a4ad73024c5dafea985128d05ca0b6b87f5fbb2