Add bearing for each point in NavigationRoute

[danesfeder]

With MAS 3.0, if you don't provide a bearing for each Point added to a NavigationRoute, you'll get a failed response for the route.

We should add a bearing to any Point that doesn't have one so the request still comes back successful. It looks like this only happens if you add one bearing value to one Point, but not the rest of the Points.

cc @cammace

[ericrwolfe]

This has lead to a few temporary workarounds that should be fixed:

• Add bearing for origin / destination  #408

• mapbox-navigation-android/app/src/main/java/com/mapbox/services/android/navigation/testapp/activity/RerouteActivity.java

  Line 160 in 79c9c4e

  navigationRouteBuilder.addBearing(null, null);

[danesfeder]

Fixed upstream in MAS mapbox/mapbox-java#614