Use a resizable dialog for wifi configuration.

Bug: 3175152

Use a custom theme that allows the dialog to resize.

Change-Id: I004b91c58d0d1810df50f9bdee9430698f51f8ab

src/com/android/settings/wifi/WifiDialog.java

@@ -38,7 +38,7 @@ class WifiDialog extends AlertDialog implements WifiConfigUiBase {
 
     public WifiDialog(Context context, DialogInterface.OnClickListener listener,
             AccessPoint accessPoint, boolean edit) {
-        super(context);
+        super(context, R.style.Theme_WifiDialog);
         mEdit = edit;
         mListener = listener;
         mAccessPoint = accessPoint;