Merge "Limit keyguard views on alt displays" into sc-dev am: b3deaf2b am:...

Merge "Limit keyguard views on alt displays" into sc-dev am: b3deaf2b am: 8ed8e0b1 am: fc522e0e

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15547527

Change-Id: I7303f0d77541b443cdb6c83e724dd2c92950f8d4