Merge "Add batch generation to OTAGUI." am: 2e1cfae4fd am: 2f8719ccad am: b7b945a034 am: 90f26c90c1

Original change: https://android-review.googlesource.com/c/platform/development/+/1775726

Change-Id: I452e06108a30cc0c633141641fec0e282c7c21f8