Merge "Improve the documentation for UnlockedDeviceRequired" into main am: 9fe168541c

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/3001500

Change-Id: Ic85c55480d730152b1553a41a31a733b0d4c094d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>