Previously we used an integer (in meters) but when using
Google Maps navigation, Google Maps picks units based on locale *and*
the distance - it might report "100m" or "20km". Then we carefully undo
all that work, and for PineTime we just as "m" so you may well have "20000m"
or more displayed, which is not ideal.
I imagine at some point that will change, but we probably want to
be able to handle that in the OSMAnd side of Gadgetbridge so all watches
that implement navigation will benefit (and won't duplicate code).
