Fix cleared metadata when repeating the same item

Issue: #1007

#minor-release

PiperOrigin-RevId: 600477540
(cherry picked from commit c6bf380)

RELEASENOTES.md

@@ -10,6 +10,8 @@
         by wrapping an instance using the
         [decorator pattern](https://en.wikipedia.org/wiki/Decorator_pattern) and
         implementing a custom `CompositeSequenceableLoaderFactory`.
+    *   Fix issue where repeating the same time causes metadata from this item
+        to be cleared ([#1007](https://github.com/androidx/media/issues/1007)).
 *   Transformer:
 *   Track Selection:
 *   Extractors:

libraries/exoplayer/src/main/java/androidx/media3/exoplayer/ExoPlayerImpl.java

@@ -2019,7 +2019,8 @@ private void updatePlaybackInfo(
       }
       staticAndDynamicMediaMetadata = MediaMetadata.EMPTY;
     }
-    if (!previousPlaybackInfo.staticMetadata.equals(newPlaybackInfo.staticMetadata)) {
+    if (mediaItemTransitioned
+        || !previousPlaybackInfo.staticMetadata.equals(newPlaybackInfo.staticMetadata)) {
       staticAndDynamicMediaMetadata =
           staticAndDynamicMediaMetadata
               .buildUpon()

libraries/exoplayer/src/test/java/androidx/media3/exoplayer/ExoPlayerTest.java

@@ -14227,6 +14227,33 @@ public void seekToZeroAndTrackSelection_withNonZeroDefaultPosition_startsPlaybac
     assertThat(positionAfterSeek).isEqualTo(0);
   }
 
+  @Test
+  public void repeatingItemWithSameStaticMetadata_keepsMetadata() throws Exception {
+    Format formatWithStaticMetadata =
+        new Format.Builder()
+            .setSampleMimeType(MimeTypes.VIDEO_H264)
+            .setMetadata(
+                new Metadata(
+                    new BinaryFrame(/* id= */ "", /* data= */ new byte[0]),
+                    new TextInformationFrame(
+                        /* id= */ "TT2",
+                        /* description= */ null,
+                        /* values= */ ImmutableList.of("title"))))
+            .build();
+    ExoPlayer player = new TestExoPlayerBuilder(context).build();
+    player.setMediaSource(new FakeMediaSource(new FakeTimeline(), formatWithStaticMetadata));
+    player.prepare();
+    player.setRepeatMode(Player.REPEAT_MODE_ONE);
+    player.play();
+
+    // Wait until item repeats.
+    runUntilPositionDiscontinuity(player, Player.DISCONTINUITY_REASON_AUTO_TRANSITION);
+    MediaMetadata metadataAfterTransition = player.getMediaMetadata();
+    player.release();
+
+    assertThat(metadataAfterTransition.title).isEqualTo("title");
+  }
+
   // Internal methods.
 
   private void addWatchAsSystemFeature() {