Add support for live HLS streams, add playlist refresh logic, add live input tracks

src/mp3/mp3-demuxer.ts

@@ -237,6 +237,10 @@ class Mp3AudioTrackBacking implements InputAudioTrackBacking {
 		return null;
 	}
 
+	async getLiveRefreshInterval() {
+		return null;
+	}
+
 	getName() {
 		return null;
 	}