Merge "Revert "Revert "Allow pulling down the status bar in visual immersive...

Merge "Revert "Revert "Allow pulling down the status bar in visual immersive mode""" into sc-dev am: f4dab5f7 am: 8571b940

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

Change-Id: I263196a613732d8c4773f3a0cea098440b550756