Use TYPE_MP4 instead of TYPE_OTHER for Dizzy.

Issue: #72
Issue: #292
Issue: #302
Issue: #425
Issue: #424

demo/src/main/java/com/google/android/exoplayer/demo/Samples.java

@@ -129,9 +129,9 @@ import java.util.Locale;
 
   public static final Sample[] MISC = new Sample[] {
     new Sample("Dizzy", "http://html5demos.com/assets/dizzy.mp4",
-        DemoUtil.TYPE_OTHER),
+        DemoUtil.TYPE_MP4),
     new Sample("Dizzy (https->http redirect)", "https://goo.gl/MtUDEj",
-        DemoUtil.TYPE_OTHER),
+        DemoUtil.TYPE_MP4),
     new Sample("Apple AAC 10s", "https://devimages.apple.com.edgekey.net/"
         + "streaming/examples/bipbop_4x3/gear0/fileSequence0.aac",
         DemoUtil.TYPE_AAC),