Merge "Adjust unit tests for supporting chain partition with no ab" into main am: b90cd3b5ab am: 63a7d5bcbf am: 6d52212e33

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

Change-Id: Id3292c9a1005825cfeb0ba2d02b47a91d53fc42a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>