Add VTS test for android.system.vold am: 6e11836c51

Original change: https://android-review.googlesource.com/c/platform/system/hardware/interfaces/+/3406600

Change-Id: Ifd129506f7b224a98b80ee4e5e2d9e7cb6515ffa
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>