Showing action buttons in collapsed QS in split shade

- Action buttons added to QQS layout, visible only in split shade
- Using the same layout and the same controller for both expanded and collapsed QS
- Properly animating expansion from QQS to QS - as everything in QQS, buttons animate downward in place where QS buttons will appear and then are hidden
- Renamed QSFooterActions* to FooterActions* because "QSFooterActionsView qqsFooterActionsView" next to "QSFooterActionsView qsFooterActionsView" looks confusing

Test: manual + tests from com.android.systemui.qs + more to come when CL approved
Fixes: 195098483
Change-Id: I878ced6576ea493256529b26417cb0db56e9a0c4