Ensure there is an initial playback event and state

example/pubspec.lock

@@ -87,7 +87,7 @@ packages:
       path: ".."
       relative: true
     source: path
-    version: "0.0.4"
+    version: "0.0.6"
   matcher:
     dependency: transitive
     description:

lib/just_audio.dart

@@ -61,7 +61,13 @@ class AudioPlayer {
 
   final _durationSubject = BehaviorSubject<Duration>();
 
-  AudioPlaybackEvent _audioPlaybackEvent;
+  // TODO: also broadcast this event on instantiation.
+  AudioPlaybackEvent _audioPlaybackEvent = AudioPlaybackEvent(
+    state: AudioPlaybackState.none,
+    updatePosition: Duration.zero,
+    updateTime: Duration.zero,
+    speed: 1.0,
+  );
 
   Stream<AudioPlaybackEvent> _eventChannelStream;