Contacts: Improve contact share popup

                // deliver is not more that 2000, because too long arguments

                // will cause TransactionTooLargeException in binder.

                if (size > ImportExportDialogFragment.MAX_COUNT_ALLOW_SHARE_CONTACT) {

                    Toast.makeText(this, R.string.share_failed,

                            Toast.LENGTH_SHORT).show();

                    String text = getString(R.string.contact_share_failed_toast,

                            ImportExportDialogFragment.MAX_COUNT_ALLOW_SHARE_CONTACT);

                    Toast.makeText(this, text, Toast.LENGTH_SHORT).show();

                    return;

                }

                Iterator<String> it = result.keySet().iterator();