Add class BatteryDiffData used to parcel battery usage data

Add class BatteryDiffData used to parcel battery usage diff data per
apps. It behaves as an interface between UI and data.

Bug: 236101687
Test: make RunSettingsRoboTests
Change-Id: I59daa9e8c5de2105ebf24c7a585c02e554735e78

src/com/android/settings/fuelgauge/batteryusage/BatteryDiffData.java

@@ -0,0 +1,46 @@
+/*
+ * 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 java.util.ArrayList;
+import java.util.List;
+
+/** Wraps the battery usage diff data for each entry used for battery usage app list. */
+public class BatteryDiffData {
+    private final List<BatteryDiffEntry> mAppEntries;
+    private final List<BatteryDiffEntry> mSystemEntries;
+
+    public BatteryDiffData(
+            List<BatteryDiffEntry> appDiffEntries, List<BatteryDiffEntry> systemDiffEntries) {
+        mAppEntries = appDiffEntries == null ? new ArrayList<>() : appDiffEntries;
+        mSystemEntries = systemDiffEntries == null ? new ArrayList<>() : systemDiffEntries;
+    }
+
+    public List<BatteryDiffEntry> getAppDiffEntryList() {
+        return mAppEntries;
+    }
+
+    public List<BatteryDiffEntry> getSystemDiffEntryList() {
+        return mSystemEntries;
+    }
+
+    /** Sets total consume power for each entry. */
+    public void setTotalConsumePowerForAllEntries(double totalConsumePower) {
+        mAppEntries.forEach(diffEntry -> diffEntry.setTotalConsumePower(totalConsumePower));
+        mSystemEntries.forEach(diffEntry -> diffEntry.setTotalConsumePower(totalConsumePower));
+    }
+}