Update examples to align with latest best practices

examples/foundational/07s-interruptible-google-audio-in.py

@@ -17,6 +17,7 @@ from runner import configure
 
 from pipecat.audio.vad.silero import SileroVADAnalyzer
 from pipecat.frames.frames import (
+    EndFrame,
     Frame,
     InputAudioRawFrame,
     LLMFullResponseEndFrame,
@@ -268,6 +269,10 @@ async def main():
             # Kick off the conversation.
             await task.queue_frames([context_aggregator.user().get_context_frame()])
 
+        @transport.event_handler("on_participant_left")
+        async def on_participant_left(transport, participant, reason):
+            await task.queue_frame(EndFrame())
+
         runner = PipelineRunner()
 
         await runner.run(task)