Merge "Fix not able to put app in split after removed task from side stage" into sc-dev

    void addTask(ActivityManager.RunningTaskInfo task, Rect rootBounds,

            WindowContainerTransaction wct) {

        final WindowContainerToken rootToken = mRootTaskInfo.token;

        wct.setHidden(rootToken, false)

                .setBounds(rootToken, rootBounds)

        wct.setBounds(rootToken, rootBounds)

                .reparent(task.token, rootToken, true /* onTop*/)

                // Moving the root task to top after the child tasks were repareted , or the root

                // task cannot be visible and focused.

                .reorder(rootToken, true);

                .reorder(rootToken, true /* onTop */);

    }

    boolean removeAllTasks(WindowContainerTransaction wct, boolean toTop) {

        // No matter if the root task is empty or not, moving the root to bottom because it no

        // longer preserves visible child task.

        wct.reorder(mRootTaskInfo.token, false /* onTop */);

        if (mChildrenTaskInfo.size() == 0) return false;

        wct.reparentTasks(

                mRootTaskInfo.token,

    boolean removeTask(int taskId, WindowContainerToken newParent, WindowContainerTransaction wct) {

        final ActivityManager.RunningTaskInfo task = mChildrenTaskInfo.get(taskId);

        if (task == null) return false;

        wct.setHidden(mRootTaskInfo.token, true)

                .reorder(mRootTaskInfo.token, false)

                .reparent(task.token, newParent, false /* onTop */);

        wct.reparent(task.token, newParent, false /* onTop */);

        return true;

    }

}