Merge "Ignore wallpaper when looking for a position for a free window."

        final int myLayer = win.mBaseLayer;

        int i;

        for (i = windows.size() - 1; i >= 0; i--) {

            if (windows.get(i).mBaseLayer <= myLayer) {

            final WindowState otherWin = windows.get(i);

            if (otherWin.getBaseType() != TYPE_WALLPAPER && otherWin.mBaseLayer <= myLayer) {

                // Wallpaper wanders through the window list, for example to position itself

                // directly behind keyguard. Because of this it will break the ordering based on

                // WindowState.mBaseLayer. There might windows with higher mBaseLayer behind it and

                // we don't want the new window to appear above them. An example of this is adding

                // of the docked stack divider. Consider a scenario with the following ordering (top

                // to bottom): keyguard, wallpaper, assist preview, apps. We want the dock divider

                // to land below the assist preview, so the dock divider must ignore the wallpaper,

                // with which it shares the base layer.

                break;

            }

        }