Use composition instead of inheritance for Odometer classes

## Description
Currently `DirectionalOdometer` is extending `DirectionlessOdometer` so to utilize some common functionality. However, a `DirectionalOdometer` is **not** a `DirectionlessOdometer`. Both are `Odometer`s that are using an `Encoder`.

## Definition of Done
`DirectionalOdometer` is no more inheriting from a concrete class and there's little to no code duplication.