Merge "Do not remove the k_k until all users are unlocked" am: 4d20410bf4 am: e013e0b98a am: 48824f7ede

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1550295

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Ia8dc48481b15486137665734e571408df4e6af60