Reformat cast DemoUtil

PiperOrigin-RevId: 222978255

demos/cast/src/main/java/com/google/android/exoplayer2/castdemo/DemoUtil.java

@@ -21,9 +21,7 @@ import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
 
-/**
- * Utility methods and constants for the Cast demo application.
- */
+/** Utility methods and constants for the Cast demo application. */
 /* package */ final class DemoUtil {
 
   public static final String MIME_TYPE_DASH = MimeTypes.APPLICATION_MPD;
@@ -71,9 +69,7 @@ import java.util.List;
             .setMedia("https://html5demos.com/assets/dizzy.mp4")
             .buildAndClear());
     SAMPLES = Collections.unmodifiableList(samples);
-
   }
 
   private DemoUtil() {}
-
 }