Enable next button if window is live

This behavior is consistent with DefaultControlDispatcher#dispatchNext().

#minor-release

PiperOrigin-RevId: 357145076

library/ui/src/main/java/com/google/android/exoplayer2/ui/PlayerControlView.java

@@ -916,7 +916,7 @@ public class PlayerControlView extends FrameLayout {
         enablePrevious = isSeekable || !window.isDynamic || player.hasPrevious();
         enableRewind = isSeekable && controlDispatcher.isRewindEnabled();
         enableFastForward = isSeekable && controlDispatcher.isFastForwardEnabled();
-        enableNext = window.isDynamic || player.hasNext();
+        enableNext = window.isLive() || player.hasNext();
       }
     }
 

library/ui/src/main/java/com/google/android/exoplayer2/ui/StyledPlayerControlView.java

@@ -1144,7 +1144,7 @@ public class StyledPlayerControlView extends FrameLayout {
         enablePrevious = isSeekable || !window.isDynamic || player.hasPrevious();
         enableRewind = isSeekable && controlDispatcher.isRewindEnabled();
         enableFastForward = isSeekable && controlDispatcher.isFastForwardEnabled();
-        enableNext = window.isDynamic || player.hasNext();
+        enableNext = window.isLive() || player.hasNext();
       }
     }