Merge "Added check to copy AVB footer" am: 4aa47338f2

Original change: https://android-review.googlesource.com/c/platform/system/core/+/2512556

Change-Id: I7fa470868758f4409e12ca56fae077b50c382326
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>