Make CtsTest resumable.

Change-Id: I5552ba3a5633a193a4cdc1b54918de985e548912
diff --git a/tools/tradefed-host/src/com/android/cts/tradefed/testtype/TestPackageDef.java b/tools/tradefed-host/src/com/android/cts/tradefed/testtype/TestPackageDef.java
index 3b89926..fd896f2 100644
--- a/tools/tradefed-host/src/com/android/cts/tradefed/testtype/TestPackageDef.java
+++ b/tools/tradefed-host/src/com/android/cts/tradefed/testtype/TestPackageDef.java
@@ -252,10 +252,9 @@
 
     /**
      * Get the collection of tests in this test package.
-     * <p/>
-     * Exposed for unit testing.
      */
-    Collection<TestIdentifier> getTests() {
+    @Override
+    public Collection<TestIdentifier> getTests() {
         return mTests;
     }
 }