Method DragView

Construct the drag view. The registration point is the point inside our view that the touch events should be centered upon. @param launcher The Launcher instance @param bitmap The view that we're dragging around. We scale it up when we draw it. @param registrationX The x coordinate of the regis

(Launcher launcher, Bitmap bitmap, int registrationX, int registrationY,
                    final float initialScale, final float finalScaleDps)