add new method to get list of class names for UiAutomatorTest

Change-Id: Ib1a14ccd3a4ace63aa106f0b30c5e1816f526762
diff --git a/src/com/android/tradefed/testtype/UiAutomatorTest.java b/src/com/android/tradefed/testtype/UiAutomatorTest.java
index 8ea81b2..25b2503 100644
--- a/src/com/android/tradefed/testtype/UiAutomatorTest.java
+++ b/src/com/android/tradefed/testtype/UiAutomatorTest.java
@@ -399,4 +399,12 @@
     public void setRunnerName(String runnerName) {
         mRunnerName = runnerName;
     }
+
+    /**
+     * Gets the list of test class names that the harness is configured to run
+     * @return list of test class names
+     */
+    public List<String> getClassNames() {
+        return mClasses;
+    }
 }