Opus initialization data should be in native order.

http://developer.android.com/reference/android/media/MediaCodec.html#CSD
-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=121957004

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

@@ -258,6 +258,9 @@ import java.util.Locale;
         "https://storage.googleapis.com/exoplayer-test-media-1/ogg/play.ogg", Util.TYPE_OTHER),
     new Sample("Google Glass (WebM Video with Vorbis Audio)",
         "http://demos.webmproject.org/exoplayer/glass_vp9_vorbis.webm", Util.TYPE_OTHER),
+    new Sample("Google Glass DASH - VP9 and Opus",
+        "http://demos.webmproject.org/dash/201410/vp9_glass/manifest_vp9_opus.mpd",
+        Util.TYPE_DASH),
     new Sample("Big Buck Bunny (FLV Video)",
         "http://vod.leasewebcdn.com/bbb.flv?ri=1024&rs=150&start=0", Util.TYPE_OTHER),
   };

extensions/opus/src/main/java/com/google/android/exoplayer/ext/opus/OpusDecoder.java

@@ -115,9 +115,9 @@ import java.util.List;
         throw new OpusDecoderException("Invalid Codec Delay or Seek Preroll");
       }
       long codecDelayNs =
-          ByteBuffer.wrap(initializationData.get(1)).order(ByteOrder.LITTLE_ENDIAN).getLong();
+          ByteBuffer.wrap(initializationData.get(1)).order(ByteOrder.nativeOrder()).getLong();
       long seekPreRollNs =
-          ByteBuffer.wrap(initializationData.get(2)).order(ByteOrder.LITTLE_ENDIAN).getLong();
+          ByteBuffer.wrap(initializationData.get(2)).order(ByteOrder.nativeOrder()).getLong();
       headerSkipSamples = nsToSamples(codecDelayNs);
       headerSeekPreRollSamples = nsToSamples(seekPreRollNs);
     } else {

library/src/androidTest/java/com/google/android/exoplayer/extractor/mkv/MatroskaExtractorTest.java

@@ -737,9 +737,9 @@ public final class MatroskaExtractorTest extends InstrumentationTestCase {
       android.test.MoreAsserts.assertEquals(TEST_OPUS_CODEC_PRIVATE,
           format.initializationData.get(0));
       assertEquals(TEST_CODEC_DELAY, ByteBuffer.wrap(format.initializationData.get(1))
-          .order(ByteOrder.LITTLE_ENDIAN).getLong());
+          .order(ByteOrder.nativeOrder()).getLong());
       assertEquals(TEST_SEEK_PRE_ROLL, ByteBuffer.wrap(format.initializationData.get(2))
-          .order(ByteOrder.LITTLE_ENDIAN).getLong());
+          .order(ByteOrder.nativeOrder()).getLong());
     } else if (MimeTypes.AUDIO_VORBIS.equals(expectedMimeType)) {
       assertEquals(2, format.initializationData.size());
       assertEquals(TEST_VORBIS_INFO_SIZE, format.initializationData.get(0).length);

library/src/main/java/com/google/android/exoplayer/extractor/mkv/MatroskaExtractor.java

@@ -1255,9 +1255,9 @@ public final class MatroskaExtractor implements Extractor {
           initializationData = new ArrayList<>(3);
           initializationData.add(codecPrivate);
           initializationData.add(
-              ByteBuffer.allocate(8).order(ByteOrder.LITTLE_ENDIAN).putLong(codecDelayNs).array());
+              ByteBuffer.allocate(8).order(ByteOrder.nativeOrder()).putLong(codecDelayNs).array());
           initializationData.add(
-              ByteBuffer.allocate(8).order(ByteOrder.LITTLE_ENDIAN).putLong(seekPreRollNs).array());
+              ByteBuffer.allocate(8).order(ByteOrder.nativeOrder()).putLong(seekPreRollNs).array());
           break;
         case CODEC_ID_AAC:
           mimeType = MimeTypes.AUDIO_AAC;