[automerge] StorageManagerService: don't ignore failures to prepare user storage 2p: 567e7a0476 am: 63fec800ad

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/17416116

Change-Id: Ie33a08f08b63cde747a213f0d1acf69732d909eb
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>