Improve the latency of DataUsageList

Up to 30x faster.

Currently it load the usage detail for every day at the beginning, so
it's quite slow.

To fix,
- Not load the usage detail for every day at the beginning
- Load only the cycles first
- And only load the daily detail for the selected month

Fix: 290856342
Test: manual - on DataUsageList (cell & wifi)
Test: unit tests
Change-Id: Ie18fa68f801743389bd6b6a28e236dcf1fea00e4

src/com/android/settings/datausage/lib/NetworkCycleChartData.kt

@@ -0,0 +1,31 @@
+/*
+ * Copyright (C) 2023 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.datausage.lib
+
+import kotlin.time.Duration.Companion.days
+
+/**
+ * Usage data in a billing cycle with daily data for plotting the usage chart.
+ */
+data class NetworkCycleChartData(
+    val total: NetworkUsageData,
+    val dailyUsage: List<NetworkUsageData>,
+) {
+    companion object {
+        val BUCKET_DURATION = 1.days
+    }
+}