fix(ios)!: create a separate audio session to automatically manage speech

[laurens]

Completely removing the plugin’s custom avSession setting in favor of usesApplicationAudioSession = false.

https://developer.apple.com/documentation/avfaudio/avspeechsynthesizer/usesapplicationaudiosession

If you set this value to false, the system creates a separate audio session to automatically manage speech, interruptions, and mixing and ducking the speech with other audio sources.

• Fixes bug: Audio playing from other App does not return to full volume after finishing speaking #138 introduced in fix(iOS): Prevent UI hangs by optimizing AVAudioSession management #135
• Fixes unintended ducking on app start (also mentioned in an issue comment )

Pull request checklist

Please check if your PR fulfills the following requirements:

• The changes have been tested successfully.
  • Tested on iOS 18.5
  • Tested on iOS 14.8

[robingenz]

Thank you! Since this is a breaking change, we have to wait for the next major release which will be the Capacitor 8 release.

[laurens]

This might even be a non-breaking fix then, as we are not calling setActive anywhere any longer?

[robingenz]

Yes, perhaps, but since Capacitor 8 is scheduled for release in December anyway, we can wait.

[laurens]

Now that Capacitor 8 is around, what are the next steps (and any help that we can offer?)