Report exporter and muxer names metrics to EditingEndedEvent

Added reporting 2 values from Transformer:

- `exporterName`: name of the package calling for export. Example: "androidx.media3.transformer".
- `muxerName`: name of the muxer used for the export operation. Example: "androidx.media3.muxer".

PiperOrigin-RevId: 714000672

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

@@ -100,6 +100,8 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
   }
 
   private static final int SUCCESS_PROGRESS_PERCENTAGE = 100;
+  private final String exporterName;
+  @Nullable private final String muxerName;
   private @MonotonicNonNull EditingSession editingSession;
   private long startTimeMs;
 
@@ -108,9 +110,16 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
    *
    * <p>A new instance must be created before starting a new export.
    *
+   * <p>Both {@code exporterName} and {@code muxerName} should follow the format
+   * "<packageName>:<version>".
+   *
    * @param context The {@link Context}.
+   * @param exporterName Java package name and version of the library or application implementing
+   *     the editing operation.
+   * @param muxerName Java package name and version of the library or application that writes to the
+   *     output file.
    */
-  public EditingMetricsCollector(Context context) {
+  public EditingMetricsCollector(Context context, String exporterName, @Nullable String muxerName) {
     @Nullable
     MediaMetricsManager mediaMetricsManager =
         (MediaMetricsManager) context.getSystemService(Context.MEDIA_METRICS_SERVICE);
@@ -118,6 +127,8 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
       editingSession = checkNotNull(mediaMetricsManager.createEditingSession());
       startTimeMs = SystemClock.DEFAULT.elapsedRealtime();
     }
+    this.exporterName = exporterName;
+    this.muxerName = muxerName;
   }
 
   /** Called when export completes with success. */
@@ -174,8 +185,14 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
 
   private EditingEndedEvent.Builder createEditingEndedEventBuilder(int finalState) {
     long endTimeMs = SystemClock.DEFAULT.elapsedRealtime();
-    return new EditingEndedEvent.Builder(finalState)
+    EditingEndedEvent.Builder editingEndedEventBuilder =
-        .setTimeSinceCreatedMillis(endTimeMs - startTimeMs);
+        new EditingEndedEvent.Builder(finalState)
+            .setTimeSinceCreatedMillis(endTimeMs - startTimeMs)
+            .setExporterName(exporterName);
+    if (muxerName != null) {
+      editingEndedEventBuilder.setMuxerName(muxerName);
+    }
+    return editingEndedEventBuilder;
   }
 
   private static int getEditingEndedEventErrorCode(@ExportException.ErrorCode int errorCode) {

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

@@ -96,6 +96,8 @@ import java.util.Locale;
   }
 
   public static final String MUXER_STOPPING_FAILED_ERROR_MESSAGE = "Failed to stop the MediaMuxer";
+  public static final String MUXER_NAME =
+      checkNotNull(MediaMuxer.class.getPackage()).getName() + ":" + SDK_INT;
 
   // MediaMuxer supported sample formats are documented in MediaMuxer.addTrack(MediaFormat).
   private static final ImmutableList<String> SUPPORTED_VIDEO_SAMPLE_MIME_TYPES =

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

@@ -22,6 +22,7 @@ import android.media.MediaCodec.BufferInfo;
 import androidx.annotation.Nullable;
 import androidx.media3.common.C;
 import androidx.media3.common.Format;
+import androidx.media3.common.MediaLibraryInfo;
 import androidx.media3.common.Metadata;
 import androidx.media3.common.MimeTypes;
 import androidx.media3.common.util.Log;
@@ -205,6 +206,9 @@ public final class InAppMuxer implements Muxer {
     }
   }
 
+  public static final String MUXER_NAME =
+      "androidx.media3.media3-muxer:" + MediaLibraryInfo.VERSION;
+
   private static final String TAG = "InAppMuxer";
   private static final int TRACK_ID_UNSET = -1;
 

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

@@ -1580,7 +1580,15 @@ public final class Transformer {
     }
     DebugTraceUtil.reset();
     if (canCollectEditingMetrics()) {
-      editingMetricsCollector = new EditingMetricsCollector(context);
+      String exporterName =
+          checkNotNull(this.getClass().getPackage()).getName() + ":" + MediaLibraryInfo.VERSION;
+      String muxerName = null;
+      if (muxerFactory instanceof InAppMuxer.Factory) {
+        muxerName = InAppMuxer.MUXER_NAME;
+      } else if (muxerFactory instanceof FrameworkMuxer.Factory) {
+        muxerName = FrameworkMuxer.MUXER_NAME;
+      }
+      editingMetricsCollector = new EditingMetricsCollector(context, exporterName, muxerName);
     }
     transformerInternal =
         new TransformerInternal(