updatePostedAndCurrentSpeed
fun updatePostedAndCurrentSpeed( locationMatcherResult: LocationMatcherResult, distanceFormatterOptions: DistanceFormatterOptions, formatter: ValueFormatter<SpeedData, Int> = PostedAndCurrentSpeedFormatter()): SpeedInfoValue?
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Evaluates LocationMatcherResult data to calculate the posted and user's current speed.
Return
an updated state for rendering in the view, null if not available (e. g. current speed is unknown)