Merge "Set expected pin length in constructor." into udc-dev am: 0754a888 am: 7a70f01a

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



Change-Id: I5a450c5d9b38ab281f8312b26b492445e4e3aec4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>