Spray inside of 3 1/2- to 4-quart slow cooker with cooking spray. In medium microwavable bowl, microwave cream cheese spread uncovered on High 25 to 30 seconds or until slightly warm and can be stirred smooth. Add soup, milk, dressing mix, garlic powder and pepper, beating well with whisk.
Add chicken to bottom of slow cooker; pour soup mixture over chicken. Cover; cook on Low heat setting 3 1/2 to 4 hours. Serve chicken and sauce over rice. Top with bacon and green onions before serving.