Merge "Allow the user to collapse the notification panel on quick settings"...

Merge "Allow the user to collapse the notification panel on quick settings" into rvc-dev am: 8e477238 am: 277c7783 am: 6e7d2b10 am: 14641d98

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/12039363

Change-Id: Ie8cd544147e26b3bf7d8b499c037b49806887e99