e78dc4088a
- Add begin_response and finish_after_current_speech methods to CallEndCoordinator for better management of speech events. - Update PromptBrain to utilize new methods, ensuring proper handling of generated closing speech and tool-only calls. - Enhance tests to verify the correct behavior of speech tracking and response handling in various scenarios, including waiting for audio to finish before ending calls. - Introduce a new test suite for CallEndCoordinator to validate the interaction with speech frames.