Merge "Adjust unit tests for supporting chain partition with no ab" into main am: b90cd3b5ab am: 63a7d5bcbf am: 6d52212e33 am: 9cf1900733

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

Change-Id: I2916a1ac52f838378708c897eeed89085c27ce85
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>