Fix mini player not being updated (regression of #3b9b5a)

app/src/main/kotlin/it/vfsfitvnm/vimusic/utils/PlayerState.kt

@@ -39,6 +39,23 @@ fun rememberMediaItemIndex(player: Player): State<Int> {
     return mediaItemIndexState
 }
 
+@Composable
+fun rememberMediaItem(player: Player): State<MediaItem?> {
+    val state = remember(player) {
+        mutableStateOf(player.currentMediaItem)
+    }
+
+    DisposableEffect(player) {
+        player.listener(object : Player.Listener {
+            override fun onMediaItemTransition(mediaItem: MediaItem?, reason: Int) {
+                state.value = mediaItem
+            }
+        })
+    }
+
+    return state
+}
+
 @Composable
 fun rememberWindows(player: Player): State<List<Timeline.Window>> {
     val windowsState = remember(player) {