am b0d646c8: SupportLenabackDemo: Make StepFragment public

* commit 'b0d646c83364fb0b43d1b42db52afb81fcfdf1c3':
  SupportLenabackDemo: Make StepFragment public

samples/SupportLeanbackDemos/src/com/example/android/leanback/MainActivity.java

@@ -42,7 +42,7 @@ public class MainActivity extends Activity {
         GuidedStepFragment.add(getFragmentManager(), mGuidedStepFragment);
     }
 
-    private static class StepFragment extends GuidedStepFragment {
+    public static class StepFragment extends GuidedStepFragment {
         @Override
         public Guidance onCreateGuidance(Bundle savedInstanceState) {
             String title = getString(R.string.main_title);