Merge "Don't do private app-dir permissions/quota on public volumes." into rvc-dev am: 15070b1833 am: fcabee6875 am: 94bd48de35

Original change: https://googleplex-android-review.googlesource.com/c/platform/system/vold/+/11079841

Change-Id: Ic6696d8872632f39244cc5c5bc04e1afe0fb8784