Merge "Clarify doc comment for setUnlockedDeviceRequired" am: a0976a12 am: f6354a20

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2060058



Change-Id: I4f5e764a5611d69557ced8afb4c33f4040e79b07
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>