Add class BatteryLevelData used to parcel the battery timestamps and

/*

 * 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.settings.fuelgauge.batteryusage;

import android.util.Log;

import com.google.common.collect.ImmutableList;

import java.util.List;

/** Wraps the battery timestamp and level data used for battery usage chart. */

public final class BatteryLevelData {

    /** A container for the battery timestamp and level data. */

    public static final class PeriodBatteryLevelData {

        private static final String TAG = "PeriodBatteryLevelData";

        private final ImmutableList<Long> mTimestamps;

        private final ImmutableList<Integer> mLevels;

        public PeriodBatteryLevelData(List<Long> timestamps, List<Integer> levels) {

            if (timestamps.size() != levels.size()) {

                Log.e(TAG, "Different sizes of timestamps and levels. Timestamp: "

                        + timestamps.size() + ", Level: " + levels.size());

                mTimestamps = ImmutableList.of();

                mLevels = ImmutableList.of();

                return;

            }

            mTimestamps = ImmutableList.copyOf(timestamps);

            mLevels = ImmutableList.copyOf(levels);

        }

        public ImmutableList<Long> getTimestamps() {

            return mTimestamps;

        }

        public ImmutableList<Integer> getLevels() {

            return mLevels;

        }

    }

    private final PeriodBatteryLevelData mDailyBatteryLevels;

    private final ImmutableList<PeriodBatteryLevelData> mHourlyBatteryLevelsPerDay;

    public BatteryLevelData(

            PeriodBatteryLevelData dailyBatteryLevels,

            List<PeriodBatteryLevelData> hourlyBatteryLevelsPerDay) {

        mDailyBatteryLevels = dailyBatteryLevels;

        mHourlyBatteryLevelsPerDay = ImmutableList.copyOf(hourlyBatteryLevelsPerDay);

    }

    public PeriodBatteryLevelData getDailyBatteryLevels() {

        return mDailyBatteryLevels;

    }

    public ImmutableList<PeriodBatteryLevelData> getHourlyBatteryLevelsPerDay() {

        return mHourlyBatteryLevelsPerDay;

    }

}