Append the test case name in the beginning

of the test log.

Change-Id: I621286274d84bfff474f1cc1e01353b3fd66dc23

media/tests/MediaFrameworkTest/src/com/android/mediaframeworktest/performance/MediaPlayerPerformance.java

@@ -117,6 +117,7 @@ public class MediaPlayerPerformance extends ActivityInstrumentationTestCase2<Med
         }
         mMemWriter = new BufferedWriter(new FileWriter
                 (new File(MEDIA_MEMORY_OUTPUT), true));
+        mMemWriter.write(this.getName() + "\n");
     }
 
     @Override