Update iOS audio session handling

[hiroshihorie]

Migrate audio handling similar to Swift
Requires livekit/react-native-webrtc#62

• Update the WebRTC dependency
• For CallKeep and patch specifically for livekit/react-native-webrtc
• Update docs about CallKit

[changeset-bot]

🦋 Changeset detected

Latest commit: 8fb65a8

The changes in this PR will be included in the next version bump.

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[hiroshihorie]

Ideally we should throw (at publish) when the audio engine fails to start (e.g. audio session activation failure), similar to how the Swift SDK's startLocalRecording() / checkAdmResult() handles this. But that can be a separate PR.

[davidliu]

LGTM, is this ready to go? I'll do some local testing on it today and merge it later if it's good.

Couple things to do:

1. Add a changeset (yarn changeset), this should be a minor patch.
2. Update the USAGE.md to add the setupIOSAudioManagement() call (could this just be moved into registerGlobals() without any side effects)?

[hiroshihorie]

Thanks @davidliu , I better do more manual/device testing also today 🙂

[hiroshihorie]

Currently blocked by "double voice processing" issue..
This WebRTC Patch: webrtc-sdk/webrtc#231 fixes the issue, and an update to react-native-webrtc is required.
Without this WebRTC patch, an ugly workaround would be required, which is not great 😅