Clarify the priority of live config values in the dev guide

PiperOrigin-RevId: 449485592

docs/live-streaming.md

@@ -84,11 +84,12 @@ ExoPlayer uses some parameters to control the offset of the playback position
 from the live edge, and the range of playback speeds that can be used to
 from the live edge, and the range of playback speeds that can be used to
 adjust this offset.
 adjust this offset.
 
 
-By default, ExoPlayer reads values for these parameters directly from the media.
-These values can also be provided per `MediaItem`, by calling
-`MediaItem.Builder.setLiveConfiguration`, or set globally on the
-`DefaultMediaSourceFactory` provided to the player. In both cases, the provided
-values will override parameters defined by the media.
+ExoPlayer gets values for these parameters from three places, in descending
+order of priority (the first value found is used):
+
+* Per `MediaItem` values passed to `MediaItem.Builder.setLiveConfiguration`.
+* Global default values set on `DefaultMediaSourceFactory`.
+* Values read directly from the media. 
 
 
 ~~~
 ~~~
 // Global settings.
 // Global settings.