Allow default notification color setting via MapboxNavigationOptions

[danesfeder]

Description

Closes #1527

• I have added any issue links
• I have added all related labels (bug, feature, new API(s), SEMVER, etc.)
• I have added the appropriate milestone and project boards

Goal

Allow developers to still utilize our default MapboxNavigationNotification, but adjust the color to the theme of their application.

Implementation

A @ColorRes int added to the MapboxNavigationOptions that is then consumed by the notification.

Screenshots or Gifs

Testing

Please describe the manual tests that you ran to verify your changes

• I have tested via a test drive, or a simulation/mock location app
• New and existing unit tests pass locally with my changes

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code

[codecov-io]

Codecov Report

Merging #1899 into master will decrease coverage by 0.02%.
The diff coverage is 16.66%.

@@             Coverage Diff              @@
##             master    #1899      +/-   ##
============================================
- Coverage     35.07%   35.04%   -0.03%     
  Complexity     1060     1060              
============================================
  Files           261      261              
  Lines          8839     8848       +9     
  Branches        667      667              
============================================
+ Hits           3100     3101       +1     
- Misses         5467     5475       +8     
  Partials        272      272

[bonnyfone]

Has this feature been removed from latest Mapbox navigation versions (2.17.4)?