Migrate AuthFsHostTest to use MicrodroidBuilder am: d4244be26a am: 8a5f962ad0 am: 7eec0140bf

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Virtualization/+/2060022

Change-Id: I9ad384a456975e6b9efb906990c40b893ac7cfd1
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>