Run start and shutdown routines in a single thread am: 6afd85c7b5

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Virtualization/+/3547759

Change-Id: I00dbc38987eea961240d8e0e0599b9b04a6ee9f4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>