[WifiSetup] Fix WifiDialog crash

Static inner class fragments need to be public.

Bug: 15742215
Change-Id: I24410b1ad6756c090fbf15f2a2ba07aa4eae5f41
diff --git a/src/com/android/settings/wifi/WifiSetupActivity.java b/src/com/android/settings/wifi/WifiSetupActivity.java
index 8e4ff48..86401fb 100644
--- a/src/com/android/settings/wifi/WifiSetupActivity.java
+++ b/src/com/android/settings/wifi/WifiSetupActivity.java
@@ -185,7 +185,7 @@
         }
     }
 
-    private static class WifiSkipDialog extends DialogFragment {
+    public static class WifiSkipDialog extends DialogFragment {
         public static WifiSkipDialog newInstance(int messageRes) {
             final Bundle args = new Bundle();
             args.putInt("messageRes", messageRes);