Add and use PasswordMetrics#validateCredential() am: 811f091fff am: 5074551422 am: 770959fc9e

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2775377

Change-Id: I0c0873da36f502767f3135fc7f1555a8725bc64d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>