Merge "Add back dismissing parallax and dimming value to stage split" into sc-v2-dev am: cc2ca8b95c am: 0e9a204b58

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15478755

Change-Id: I434b99d483dd3a04e7f394e09208338c99c32d5e