Merge "Deprecate user pre-creation methods in UserManager." into udc-dev am: 0394f5cf

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22339406



Change-Id: I001bd08c2ed8d8acfcc3a0736cb77c204c23d513
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>