Restore wrap_content for album rail.

app/src/main/res/layout/exo_player_control_view.xml

@@ -51,7 +51,7 @@
 
     <androidx.recyclerview.widget.RecyclerView
         android:id="@+id/media_preview_album_rail"
-        android:layout_width="match_parent"
+        android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_gravity="center"
         android:layout_marginTop="11dp"