Merge "Customize StubVolume implementation for ARC" am: 253dd94521 am: 802d1d256a am: 46b3c1da6a

Original change: https://android-review.googlesource.com/c/platform/system/vold/+/1532070

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Ib006681d51cef3466a37107ef8e4224ea05d7956