Properly validate credential in setLock(int, byte[], int, byte[]) am: 27a062bcc2 am: 303d254746

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2775381

Change-Id: Ie4eeed30128c33640da1651a5ffec0a586f9b9e4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>