fix: Fix audioSetPreferences giving Exception

[AndreasLymalmMTM]

Problem

On Android, trying to call audioSetPreferences with any parameter configuration of AudioPreferences gives the exception:

Invalid argument: Instance of 'AudioPreferences'

Implemented Solution

Changed how the parameter is passed, mimicking the audioEnable function.

Testing

Android

Calling audioSetPreferences and then previous or next worked.

iOS

When testing on iOS, no exception was thrown, but previous and next didn't work (didn't skip any audio).

[ddfreiling]

Thanks Andreas, we also need a small fix on the Flutter side to turn the object into a Map, I will do this after merge.

EDIT: Nevermind, | missed that this also included the platform side fix.