Merge "Pack all boot images in a zip for certification" am: 9e8e85292b am: 03d1dc5c7e am: d50c0828e3 am: ba08bc42e9

Original change: https://android-review.googlesource.com/c/platform/development/+/1936022

Change-Id: I952ce7825726ae3e912db9f815bb8cfc2c24f0af