Rename to getRegisteredInstance

[kmadsen]

Description

The MapboxAudioGuidance instance is going to be part of the 2.9.0 stable release train. So this is settling on a naming convention to use in a few places #6420 (comment)

We are also updating a different incompatibility for this release. So the qa-test-app does not see the runtime crash during development. This will all be resolved after a release and then updating the ui-androidauto to use the new release.

[codecov]

Codecov Report

Merging #6445 (efe955a) into main (cf2980c) will increase coverage by 0.00%.
The diff coverage is 46.66%.

@@            Coverage Diff            @@
##               main    #6445   +/-   ##
=========================================
  Coverage     69.31%   69.31%           
  Complexity     4730     4730           
=========================================
  Files           703      703           
  Lines         27759    27760    +1     
  Branches       3274     3274           
=========================================
+ Hits          19242    19243    +1     
  Misses         7226     7226           
  Partials       1291     1291           

Impacted Files	Coverage Δ
...igation/ui/voice/view/MapboxAudioGuidanceButton.kt	72.36% <33.33%> (ø)
...box/navigation/ui/voice/api/MapboxAudioGuidance.kt	79.68% <50.00%> (ø)
.../voice/internal/ui/AudioGuidanceButtonComponent.kt	93.93% <66.66%> (+0.18%)	⬆️
...nternal/controller/AudioGuidanceStateController.kt	77.27% <100.00%> (ø)

[kmadsen]

oh gosh i forgot about the license needing to be changed a bunch whenever there is a change to these dependencies