Merge "Revert "Ignore to show splash screen if the decorView is not opaque"" into rvc-qpr-dev am: 132a346318 am: 9dce71fe0a

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/13178636

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Ib1220d3d5e184e5701d9fe8e4e978d3aa2955bb8