MapboxManeuverView does not handle error result

Nobody has claimed this yet.

`MapboxManeuverView` currently renders maneuvers only when the result is Success and the components list is not empty

```
fun renderManeuvers(maneuvers: Expected>) {
maneuvers.onValue { list ->
if (list.isNotEmpty()) {
currentlyRenderedManeuvers.clear()
currentlyRenderedManeuvers.addAll(list)
renderManeuvers()
}
}
}
```

In this case if the list is empty or the result is `error`, then the view would continue to show previous maneuver.

Start at MapboxManeuverView.renderManeuvers and trace both Expected branches. Reproduce an empty-list and error result after a prior successful render; done means the previous maneuver is no longer shown in either case, with regression coverage in the relevant existing test area.

Written by the indexing model from the issue text.