[automerger skipped] Merge "Cached list of pre-created users on...

[automerger skipped] Merge "Cached list of pre-created users on UserManagerService." into rvc-qpr-dev am: e54b76c0 am: 763f1149 -s ours

am skip reason: Change-Id Ib4068cce7d4cea56e0937099508469e49e3412e2 with SHA-1 d4407fd5 is in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/12494974

Change-Id: I1e59857faf80ed949ff8175d7a11e7efab14d685