Update IntentUtil.java to parse title (metadata)

Added the String title in the Intent so MediaMetadata.title can be populated correctly for single media items. This is useful to query PlayerActivity about what it is currently playing.

demos/main/src/main/java/com/google/android/exoplayer2/demo/IntentUtil.java

@@ -64,6 +64,8 @@ public class IntentUtil {
   public static final String SUBTITLE_URI_EXTRA = "subtitle_uri";
   public static final String SUBTITLE_MIME_TYPE_EXTRA = "subtitle_mime_type";
   public static final String SUBTITLE_LANGUAGE_EXTRA = "subtitle_language";
+  
+  public static final String TITLE_EXTRA = "title_uri";
 
   /** Creates a list of {@link MediaItem media items} from an {@link Intent}. */
   public static List<MediaItem> createMediaItemsFromIntent(Intent intent) {
@@ -89,6 +91,7 @@ public class IntentUtil {
       MediaItem mediaItem = mediaItems.get(0);
       MediaItem.PlaybackProperties playbackProperties = checkNotNull(mediaItem.playbackProperties);
       intent.setAction(ACTION_VIEW).setData(mediaItem.playbackProperties.uri);
+      intent.putExtra(TITLE_EXTRA, mediaItem.mediaMetadata.title);
       addPlaybackPropertiesToIntent(playbackProperties, intent, /* extrasKeySuffix= */ "");
       addClippingPropertiesToIntent(
           mediaItem.clippingProperties, intent, /* extrasKeySuffix= */ "");
@@ -113,6 +116,7 @@ public class IntentUtil {
         new MediaItem.Builder()
             .setUri(uri)
             .setMimeType(mimeType)
+            .setMediaMetadata(new MediaMetadata.Builder().setTitle(intent.getStringExtra(TITLE_EXTRA)).build())
             .setAdTagUri(intent.getStringExtra(AD_TAG_URI_EXTRA + extrasKeySuffix))
             .setSubtitles(createSubtitlesFromIntent(intent, extrasKeySuffix))
             .setClipStartPositionMs(