Enforce minimum pattern length in PasswordMetrics am: 6d5531ffc9 am: f48ae1473a

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2775382

Change-Id: Ic80f4c44f7f494dfd813e5cc317dec679f522d03
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>