Merge "Implement the legacy splash screen behavior" into sc-dev am: 2be72d03 am: c56fa470 am: accefb90

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/14920934

Change-Id: I07f186a7b9d0506377e3cbdc885a4a5ebc8ce4fa