Merge "Add README explaining how to use vmbase." am: 7d6c8792ec

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Virtualization/+/2111606

Change-Id: I16e01e47ec9749d46be20c43eeea0abc506f3512
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>