OverviewActions: Creating single view instance.

Makes use of there being a single instance of OverviewActionsView
rather than each Task having it's own.

Change-Id: I881121f84de99cade3cd8f07fa8510a557b28f57

quickstep/src/com/android/launcher3/BaseQuickstepLauncher.java

@@ -196,7 +196,10 @@ public abstract class BaseQuickstepLauncher extends Launcher
 
         if (FeatureFlags.ENABLE_OVERVIEW_ACTIONS.get() && removeShelfFromOverview(this)) {
             // Overview is above all other launcher elements, including qsb, so move it to the top.
-            getOverviewPanelContainer().bringToFront();
+            getOverviewPanel().bringToFront();
+            if (getActionsView() != null) {
+                getActionsView().bringToFront();
+            }
         }
     }