Merge "Set expected pin length in constructor." into udc-dev am: 0754a888c2 am: 0ff0b9c867

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23264097

Change-Id: Ie4c5b3475cb3567fd9f9317920a092f6ac0a5953
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>