Add DebugTracing to Transformer test

PiperOrigin-RevId: 827411161

Author: claincly

libraries/transformer/src/androidTest/java/androidx/media3/transformer/TransformerAndroidTestRunner.java

@@ -244,6 +244,9 @@ public ExportTestResult run(String testId, Composition composition, @Nullable St
     try {
       ExportTestResult exportTestResult = runInternal(testId, composition, oldFilePath);
       resultJson.put("exportResult", exportTestResult.asJsonObject());
+      if (DebugTraceUtil.enableTracing) {
+        resultJson.put("debugTrace", DebugTraceUtil.generateTraceSummary());
+      }
       if (exportTestResult.exportResult.exportException != null) {
         throw exportTestResult.exportResult.exportException;
       }

libraries/transformer/src/androidTest/java/androidx/media3/transformer/TransformerMultiSequenceCompositionTest.java

@@ -43,6 +43,7 @@
 import androidx.media3.common.util.Util;
 import androidx.media3.effect.AlphaScale;
 import androidx.media3.effect.Contrast;
+import androidx.media3.effect.DebugTraceUtil;
 import androidx.media3.effect.DefaultVideoFrameProcessor;
 import androidx.media3.effect.Presentation;
 import androidx.media3.effect.ScaleAndRotateTransformation;
@@ -52,6 +53,7 @@
 import java.io.File;
 import java.io.IOException;
 import java.util.List;
+import org.junit.After;
 import org.junit.Before;
 import org.junit.Rule;
 import org.junit.Test;
@@ -99,10 +101,17 @@ public static ImmutableList<Object[]> parameters() {
   public int maxFramesInEncoder;
 
   @Before
-  public void setUpTestId() {
+  public void setUp() {
+    // TODO: b/456187265 - Remove this once the bug is fixed.
+    DebugTraceUtil.enableTracing = true;
     testId = testName.getMethodName();
   }
 
+  @After
+  public void tearDown() {
+    DebugTraceUtil.enableTracing = false;
+  }
+
   @Test
   public void export_withTwoSequencesEachWithOneVideoMediaItem_succeeds() throws Exception {
     assumeFormatsSupported(