Tint task bar based on sampling of colors in the area

TODO: Add transition animation

Bug: 193938970
Test: manual
Change-Id: I0ffb94e0f11d47685a268ee8d057b6997f3a2ff6

quickstep/src/com/android/launcher3/taskbar/TaskbarControllers.java

@@ -86,5 +86,6 @@ public class TaskbarControllers {
         taskbarDragLayerController.onDestroy();
         taskbarKeyguardController.onDestroy();
         taskbarViewController.onDestroy();
+        stashedHandleViewController.onDestroy();
     }
 }