Add accessibility properties to CKILoginViewController cancel button
Add accessibility properties to CKILoginViewController cancel button

Refs #MBL-5360

derrh/CanvasKit,instructure/CanvasKit,nlambson/CanvasKit,derrh/CanvasKit,derrh/CanvasKit,nlambson/CanvasKit,instructure/CanvasKit,instructure/CanvasKit,nlambson/CanvasKit,nlambson/CanvasKit,derrh/CanvasKit,instructure/CanvasKit