Merge "Move staging value application logic to persistent_properties and add unit tests" into main am: fa21f12e3b am: 2854ab55d0 am: 55095392ab

Original change: https://android-review.googlesource.com/c/platform/system/core/+/2801973

Change-Id: Ic6cdb7cfd2bdecf087ede0d6bc2dd235707aca3e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>