[Android Auto] Remove MapboxNavigation instance from ActiveGuidanceScreen

[kmadsen]

Description

Addressing #6141

After removing MapboxNavigation from CarActiveGuidanceCarContext and fixing up ActiveGuidanceScreen, it was clear that we no longer need CarActiveGuidanceCarContext so this is deleting it 🎉

This also moves the PlacesListOnMapLayerUtil out of the constructor. We may want to add marker customizations but this is not how we can do it. Anything we want to do there can be handled first by the new CarActiveGuidanceMarkers.

Adding CarArrivalTrigger as a definition for what to do when the arrival happen. It was in the ActiveGuidanceScreen, but moving it to a separate class will make it easy for us to integrate into the installer #6211

I'm opening this now and would be happy to merge it. Otherwise I'll add tests to the new classes because that logic does not have any coverage.

[codecov]

Codecov Report

Merging #6326 (1dc164d) into main (1dc164d) will not change coverage.
The diff coverage is n/a.

❗ Current head 1dc164d differs from pull request most recent head a0abb34. Consider uploading reports for the commit a0abb34 to get more accurate results

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##               main    #6326   +/-   ##
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  Coverage     68.88%   68.88%           
  Complexity     4504     4504           
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  Files           681      681           
  Lines         27002    27002           
  Branches       3162     3162           
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  Hits          18601    18601           
  Misses         7182     7182           
  Partials       1219     1219