Turn off ExoPlayer metrics reporting when used by Transformer.

This avoids affecting ExoPlayer metrics with non-typical usage.

PiperOrigin-RevId: 506878231

libraries/transformer/src/main/java/androidx/media3/transformer/ExoPlayerAssetLoader.java

@@ -165,7 +165,8 @@ public final class ExoPlayerAssetLoader implements AssetLoader {
             .setMediaSourceFactory(mediaSourceFactory)
             .setTrackSelector(trackSelector)
             .setLoadControl(loadControl)
-            .setLooper(looper);
+            .setLooper(looper)
+            .setUsePlatformDiagnostics(false);
     if (clock != Clock.DEFAULT) {
       // Transformer.Builder#setClock is also @VisibleForTesting, so if we're using a non-default
       // clock we must be in a test context.