Use webview audio controls ( >= iOS26)

### Your use case

For iOS >= 26 the webkit audio devices situation improves significantly. With older versions a workaround was needed so that the user can change audio device with the os ouptut device selector since there were no devices exposed to the webview. This changes with iOS26 where we can also access the earpiece directly with the web api's.

Based on the iOS version we want to use this now working api instead of the controlled media workaround which we now only want to keep for older iOS versions.

Currently blocked by:
- https://github.com/livekit/client-sdk-js/issues/1568

### Have you considered any alternatives?

_No response_

### Additional context

_No response_