Add util class for plurals

/*

 * 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 android.util;

import android.annotation.NonNull;

import android.annotation.StringRes;

import android.content.res.Resources;

import android.icu.text.MessageFormat;

import java.util.Map;

/**

 * Helper class for easier formatting of ICU {@link android.icu.text.MessageFormat} syntax.

 * @hide

 */

public class PluralsMessageFormatter {

    /**

     * Formatting the ICU {@link android.icu.text.MessageFormat} syntax

     *

     * @param resources the {@link android.content.res.Resources}

     * @param arguments the mapping of argument names and values

     * @param messageId the string resource id with {@link android.icu.text.MessageFormat} syntax

     * @return the formatted result

     */

    public static String format(@NonNull Resources resources,

            Map<String, Object> arguments,

            @StringRes int messageId) {

        return new MessageFormat(resources.getString(messageId)).format(arguments);

    }

}