fix: audio interruption on android

[Brazol]

Use AudioSwitch for focus change listener to have a single source of focus truth.
Check phone state permissions to avoid crashes

[Copilot]

Pull request overview

This pull request fixes audio interruption handling on Android by consolidating audio focus management through AudioSwitch and adding permission checks to prevent crashes related to telephony state monitoring.

• Deprecated unused audio attribute parameters (androidAudioAttributesUsageType and androidAudioAttributesContentType) that are no longer needed with the new AudioSwitch-based approach
• Implemented a forwarding listener pattern to allow dynamic audio focus listener updates without recreating AudioSwitch
• Added comprehensive permission checking and error handling for telephony state monitoring to prevent SecurityExceptions

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 7 comments.

Show a summary per file

File	Description
lib/src/native/factory_impl.dart	Deprecated audio attribute parameters and removed their usage in method call arguments
lib/src/helper.dart	Added regainAndroidAudioFocus() helper method for manually requesting audio focus
android/src/main/java/io/getstream/webrtc/flutter/audio/AudioSwitchManager.java	Introduced ForwardingAudioFocusChangeListener pattern and setAudioFocusChangeListener() method for dynamic listener management
android/src/main/java/io/getstream/webrtc/flutter/audio/AudioFocusManager.java	Refactored to use AudioSwitch for focus changes, added permission checking, improved thread safety with interruption state tracking, and added try-catch for telephony registration
android/src/main/java/io/getstream/webrtc/flutter/MethodCallHandlerImpl.java	Removed deprecated audio attribute parameter handling, added regainAndroidAudioFocus case, and cleanup in dispose method
CHANGELOG.md	Documented the audio focus improvements and new API

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.