ExampleActivity refactor for simplicity/stability

[devotaaabel]

Description

This addresses multiple issues with the ExampleActivity:

• It simplifies the possible states while adding SEARCH state. Previously, there were SHOW_LOCATION, FIND_ROUTE, ROUTE_FOUND and NAVIGATE states. Now, there's SHOW_LOCATION (just showing users location on the map), SHOW_ROUTE (showing a route either from a destination long clicked on the map, or found via search), SEARCH (search view is open), and NAVIGATE. The directions fab is removed because the intermediary step is no longer needed.

• Fixes some backstack issues, including pulling in the fix from here and also addressing some of the issues listed in Multiple issues with example activity #1874

• Retrieved profile and simulate route values from shared preferences as set in settings activity (still have to add onActivityResult)

• Also added some extra visibility for the settings fab

• 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

The goal is to make this activity simpler, more useful for testing, and less buggy, while also allowing the ability to try different settings.

Implementation

Disclaimer: I'm still having some crazy issues with the camera. These issues exist on master so I don't believe they have anything to do with my changes.

Screenshots or Gifs

Let me know if there's any screenshots/gifs that would help this PR.

Testing

Tested the different settings, profiles/simulate route, and tested that the profiles were translating into the urls. UI tested the example flow, including the search, to try to catch edge cases.

• I have tested locally (including SNAPSHOT upstream dependencies if needed)
• 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 #1884 into master will increase coverage by 0.02%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master    #1884      +/-   ##
============================================
+ Coverage     35.04%   35.07%   +0.02%     
  Complexity     1060     1060              
============================================
  Files           261      261              
  Lines          8848     8839       -9     
  Branches        667      667              
============================================
- Hits           3101     3100       -1     
+ Misses         5475     5467       -8     
  Partials        272      272

[danesfeder]

@devotaaabel first pass here looks good. Will check back when the animation work is good to go as well. Thanks for running with this

[devotaaabel]

@mapbox/navigation-android I removed the intro animations from the scope of this PR and and working on that separately. This is ready for final review

[danesfeder]

@devotaaabel just gave this another pass - everything is looking good, just one minor regression where the destination icon is no longer being drawn:

Once we re-add that, we should be good to go here. Going to go ahead and approve regardless. Thanks!