Merge "[flexiglass] Pattern bouncer UX polish." into udc-dev am: e2ccf110...

Merge "[flexiglass] Pattern bouncer UX polish." into udc-dev am: e2ccf110 am: a5ab019a am: 3ec30cad

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23246162



Change-Id: Ida6d9be282c1dd47270adb79edd1f70807c58fc4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>