Merge "Revert "Revert "Allow pulling down the status bar in visual immersive mode""" into sc-dev am: f4dab5f7 am: 34051a89 am: 1b103673

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/14554724

Change-Id: Ibaf66ec5e0e58557ab9f6d6c3b9ad9a7d9b4d5d9