591618c8b5
Use the visibleRegion property to determine if a layer is visible on the screen or not. Elements may have a size and a crop but be displayed below another. While the visible option cannot be used to render the elements due to transforms, it only has a value if the element is displayed on the screen. Note that elements may still not appear on the screen as all their visible regions are below the screen (right < 0 or bottom < 0) Test: Open trace in winscope, check if only layers visible on the screen have a visible chip and are displayed. Change-Id: I75137a5057a5bda96db887b110b053e64b49f885