Distance to maneuver should be rounded in CarPlay

[1ec5]

Distances shown in CarPlay’s maneuver panel aren’t rounded as they are inside NavigationViewController.

RoundingTable.threshold(for:) is getting called, and DistanceFormatter.measurement(of:) even sets NumberFormatter.roundingIncrement before calling Threshold.measurement(for:), but Threshold.measurement(for:) doesn’t use the number formatter and doesn’t perform any rounding when creating the Measurement:

mapbox-navigation-ios/MapboxCoreNavigation/DistanceFormatter.swift

Line 217 in 3abfaae

numberFormatter.roundingIncrement = threshold.roundingIncrement as NSNumber

mapbox-navigation-ios/MapboxCoreNavigation/DistanceFormatter.swift

Line 85 in 3abfaae

return Measurement(value: distance.miles, unit: .miles)

Threshold.roundingIncrement can be readily plugged into the Double.rounded(to:) method shown in mapbox/mapbox-directions-swift#311 (comment).

/ref #1853
/cc @mapbox/navigation-ios