Enforce that internal storage is prepared first am: c193c3fbb8

Original change: https://googleplex-android-review.googlesource.com/c/platform/system/vold/+/18163020

Change-Id: Ide14963edb87119fa4c7b06cee5a2d01eb1fe8dc
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>