Merge "Extracting buttons below expanded QS to a separate view and controller" into sc-v2-dev am: 0f7c56a233 am: 8ae201fa92

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15425036

Change-Id: I04ea62a8af8fc6263ec23516cd64f0ab50a6e6a5