Propagate LoadErrorHandlingPolicy to SingleSampleMediaSource.Factory

I think this was missed when integrating DefaultMediaSourceFactory with
SingleSampleMediaSource.Factory in
315ba6f324

Issue: #8430
#minor-release
PiperOrigin-RevId: 350759580

RELEASENOTES.md

@@ -41,6 +41,11 @@
     *   Add option to `MergingMediaSource` to clip the durations of all sources
         to have the same length
         ([#8422](https://github.com/google/ExoPlayer/issues/8422)).
+    *   Fix propagation of `LoadErrorHandlingPolicy` from
+        `DefaultMediaSourceFactory` into `SingleSampleMediaSource.Factory` when
+        creating subtitle media sources from
+        `MediaItem.playbackProperties.subtitles`
+        ([#8430](https://github.com/google/ExoPlayer/issues/8430)).
 *   Extractors:
     *   Populate codecs string for H.264/AVC in MP4, Matroska and FLV streams to
         allow decoder capability checks based on codec profile/level

library/core/src/main/java/com/google/android/exoplayer2/source/DefaultMediaSourceFactory.java

@@ -360,7 +360,8 @@ public final class DefaultMediaSourceFactory implements MediaSourceFactory {
       MediaSource[] mediaSources = new MediaSource[subtitles.size() + 1];
       mediaSources[0] = mediaSource;
       SingleSampleMediaSource.Factory singleSampleSourceFactory =
-          new SingleSampleMediaSource.Factory(dataSourceFactory);
+          new SingleSampleMediaSource.Factory(dataSourceFactory)
+              .setLoadErrorHandlingPolicy(loadErrorHandlingPolicy);
       for (int i = 0; i < subtitles.size(); i++) {
         mediaSources[i + 1] =
             singleSampleSourceFactory.createMediaSource(