Merge changes from topic "deny-create-user-dirs" am: 9fb8825578

Original change: https://android-review.googlesource.com/c/platform/system/vold/+/2095484

Change-Id: I89516d7b997e2b48e1767e895c797eec349ffa17
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>