Merge "Create an API for calculating size requirement for compressed APEX" am: e6c4c1e4c5

Original change: https://android-review.googlesource.com/c/platform/system/apex/+/1587493

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I6cf3050f636baffe7315a2b16c5cc666e2c81bc2