Revert "Migrate AuthFsHostTest to use MicrodroidBuilder" am: 4bdd2e837d am: a6cd574a1c

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Virtualization/+/2060031

Change-Id: I339c33798dda9f845dddb56418af6d1257b31b22
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>