The presumption that a parent should be appointed or retained as managing conservator of the child is rebutted if the court finds that:
(1) the parent has voluntarily relinquished actual care, control, and possession of the child to a nonparent, a licensed child-placing agency, or the Department of Family and Protective Services for a period of one year or more, a portion of which was within 90 days preceding the date of intervention in or filing of the suit; and
(2) the appointment of the nonparent, agency, or Department of Family and Protective Services as managing conservator is in the best interest of the child.