Properly validate credential in setLock(int, byte[], int, byte[]) am:...

Properly validate credential in setLock(int, byte[], int, byte[]) am: 27a062bc am: 303d2547 am: ece9f18b am: 8ffa745b

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



Change-Id: I2b7c04e58ff2fba6e914374170869077acb2f3f0
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>