Right now, it will allow us to set the selected item more nicely.
In the near future, we will use this dependency to control the visual
display of the bottom nav better (e.g. icons/text appearance/animation).
Note that there is a bit of development going on at the Android team,
and the official bottom navigation view may oneday support all of these
features. In that case, we should probably switch back.
43a9a9d229