Move some VM config APIs to @TestApi am: 147eb6f930

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Virtualization/+/2323518

Change-Id: I52144ed484822fecd5b852bc5a28689d604175f8
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>