Added missing `subText` (#40486)
Added missing `subText` (#40486)

`onNotification` method returns `subText` value as well, if present in `localNotificationSchedule` method.
georgemarshall/DefinitelyTyped,georgemarshall/DefinitelyTyped,mcliment/DefinitelyTyped,markogresak/DefinitelyTyped,dsebastien/DefinitelyTyped,georgemarshall/DefinitelyTyped,dsebastien/DefinitelyTyped,georgemarshall/DefinitelyTyped