Allow starring route from route header on map view

[barbeau]

Summary:

Requested by user:

Suggest you make it easier to put a star on the route map. I can't figure out how to do it on my phone.

It makes sense to add a star in the route header:

...as that's how we allow the user to star stops, and routes when viewing routes in sliding panel header:

I assume starring the route header would star all directions of that route (which is what we show on the map), although this requires some thought, as the other starred route options are related to a particular direction and stop.

Related to "Starred Routes" list - https://github.com/OneBusAway/onebusaway-android/issues/354.

Steps to reproduce:

Tap on arrival time and select "Show route on map".

Expected behavior:

Allow me to star the entire route by tapping on a star next the route name in route header.

Observed behavior:

I can't star the route by tapping anywhere on the header.

Device and Android version:

N/A