[vold] Add argument verification to IncFS methods am: 131365a3e5 am: 8a24abaabe am: 1ad77eae51

Original change: https://googleplex-android-review.googlesource.com/c/platform/system/vold/+/10835687

Change-Id: I0a35bf7ca30f8a3304e830c778f26946299dc1bc