fix(ExpendableTile): add initial state to prevent warnings (#1373)
fix(ExpendableTile): add initial state to prevent warnings (#1373)


carbon-design-system/carbon-components-react,carbon-design-system/carbon-components-react,carbon-design-system/carbon-components,joshblack/carbon-components-react,carbon-design-system/carbon-components,joshblack/carbon-components-react,carbon-design-system/carbon-components