Remove GrantAdminDialogController from code base

/*

 * Copyright (C) 2022 The Android Open Source Project

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *      http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

package com.android.settingslib.users;

import android.app.Activity;

import android.app.AlertDialog;

import android.app.Dialog;

import android.view.LayoutInflater;

import android.view.View;

import android.widget.RadioButton;

import android.widget.RadioGroup;

import com.android.settingslib.R;

import java.util.function.Consumer;

/**

 * This class encapsulates a Dialog for choosing whether to grant admin privileges.

 */

public class GrantAdminDialogController {

    /**

     * Creates a dialog with option to grant user admin privileges.

     */

    public Dialog createDialog(Activity activity,

            Consumer<Boolean> successCallback, Runnable cancelCallback) {

        LayoutInflater inflater = LayoutInflater.from(activity);

        View content = inflater.inflate(R.layout.grant_admin_dialog_content, null);

        RadioGroup radioGroup = content.findViewById(R.id.choose_admin);

        RadioButton radioButton = radioGroup.findViewById(R.id.grant_admin_yes);

        radioButton.setChecked(true);

        Dialog dlg = new AlertDialog.Builder(activity)

                .setView(content)

                .setTitle(R.string.user_grant_admin_title)

                .setMessage(R.string.user_grant_admin_message)

                .setPositiveButton(android.R.string.ok,

                        (dialog, which) ->  {

                            if (successCallback != null) {

                                successCallback.accept(radioButton.isChecked());

                            }

                        })

                .setNegativeButton(android.R.string.cancel, (dialog, which) -> {

                    if (cancelCallback != null) {

                        cancelCallback.run();

                    }

                })

                .setOnCancelListener(dialog -> {

                    if (cancelCallback != null) {

                        cancelCallback.run();

                    }

                })

                .create();

        return dlg;

    }

}