Merge "launcher: enable swipe down to open focused app" into sc-v2-dev am:...

Merge "launcher: enable swipe down to open focused app" into sc-v2-dev am: 2e15dde6 am: 63d04c5c

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/15297765

Change-Id: If4dab562459c82869da6c1fd4013f4e795c5b630