[automerger skipped] Merge "Animate QS alpha on split shade pull down" into sc-v2-dev-plus-aosp am: 60030dce -s ours

am skip reason: Merged-In I6532c8a78826a5b60609dc66557abc49a3f140c5 with SHA-1 1ec71012 is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/16032776

Change-Id: I759d453c22bbf9891e55f3e5b81f8a1eaa849013