[ios] Interrupt podcasts instead of duck them during TTS

[fabwu]

Use AVAudioSessionCategoryOptionInterruptSpokenAudioAndMixWithOthers to interrupt spoken content during TTS.

Apple recommends using this option for navigation apps:

Set this option if your app’s audio is occasional and spoken, such as in a turn-by-turn navigation app or an exercise app. This avoids intelligibility problems when two spoken audio apps mix. If you set this option, also set the AVAudioSessionCategoryOptionDuckOthers option unless you have a specific reason not to. Ducking other audio, rather than interrupting it, is appropriate when the other audio isn’t spoken audio.

Source

[biodranik]

Thanks! Did you test it?

[fabwu]

Thanks! Did you test it?

I did a test on mobile but let me test it on CarPlay today and I get back to you.

[fabwu]

@biodranik I tested these changes on both mobile and CarPlay and a podcast gets interrupted during the navigation announcements. I think the PR is ready to be merged.

[biodranik]

@fabwu thank you very much!