Merge "Revert "Customize StubVolume implementation for ARC"" am: 5558a72d03

Original change: https://android-review.googlesource.com/c/platform/system/vold/+/1553535

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I5c7f898a1229e2c859a6add61b0024bb95c7d8ce