Merge "Fix surface didn't fade out when dismiss" into udc-dev

            boolean isOpening = TransitionUtil.isOpeningType(info.getType());

            if (!isOpening && (mode == TRANSIT_CLOSE || mode == TRANSIT_TO_BACK)) {

                // fade out

                if (change.getSnapshot() != null) {

                    // This case is happened if task is going to reparent to TDA, the origin leash

                    // doesn't rendor so we use snapshot to replace it animating.

                    t.reparent(change.getSnapshot(), info.getRoot(rootIdx).getLeash());

                    // Use origin leash layer.

                    t.setLayer(change.getSnapshot(), info.getChanges().size() - i);

                    t.setPosition(change.getSnapshot(), change.getStartAbsBounds().left,

                            change.getStartAbsBounds().top);

                    t.show(change.getSnapshot());

                    startFadeAnimation(change.getSnapshot(), false /* show */);

                } else {

                startFadeAnimation(leash, false /* show */);

                }

            } else if (mode == TRANSIT_CHANGE && change.getSnapshot() != null) {

                t.reparent(change.getSnapshot(), info.getRoot(rootIdx).getLeash());

                // Ensure snapshot it on the top of all transition surfaces