Merge "Adjust unit tests for supporting chain partition with no ab" into main...

Merge "Adjust unit tests for supporting chain partition with no ab" into main am: b90cd3b5 am: 63a7d5bc

Original change: https://android-review.googlesource.com/c/platform/system/core/+/2765270



Change-Id: I7029d6a0a0fb84ac6f86f3f85d5b233d6bb45f38
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>