[automerger skipped] Merge "Animate QS alpha on split shade pull down" into sc-v2-dev am: 59d7598b52 -s ours am: 5a262c656e -s ours

am skip reason: skipped by user dupin

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/16011176

Change-Id: I40c76d88ddbe32bfd12f15504a6692aa9a07db91