Add high usage battery tip

1. Add both model and detector
2. Move the screen usage method to BatteryUtils
so we could reuse it.
3. Add and update the tests

Bug: 70570352
Test: RunSettingsRoboTests

Change-Id: I6a7248d9d48ee8cb6fc2c18c8c225210d49b6bc9

src/com/android/settings/fuelgauge/batterytip/tips/HighUsageTip.java

@@ -0,0 +1,90 @@
+/*
+ * Copyright (C) 2018 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.batterytip.tips;
+
+import android.app.Dialog;
+import android.content.Context;
+
+import com.android.settings.R;
+
+import java.util.List;
+
+/**
+ * Tip to show general summary about battery life
+ */
+public class HighUsageTip extends BatteryTip {
+
+    private final CharSequence mScreenTimeText;
+    private final List<HighUsageApp> mHighUsageAppList;
+
+    public HighUsageTip(CharSequence screenTimeText, List<HighUsageApp> appList) {
+        mShowDialog = true;
+        mScreenTimeText = screenTimeText;
+        mType = TipType.HIGH_DEVICE_USAGE;
+        mHighUsageAppList = appList;
+        mState = appList.isEmpty() ? StateType.INVISIBLE : StateType.NEW;
+    }
+
+    @Override
+    public CharSequence getTitle(Context context) {
+        return context.getString(R.string.battery_tip_high_usage_title);
+    }
+
+    @Override
+    public CharSequence getSummary(Context context) {
+        return context.getString(R.string.battery_tip_high_usage_summary, mScreenTimeText);
+    }
+
+    @Override
+    public int getIconId() {
+        return R.drawable.ic_perm_device_information_red_24dp;
+    }
+
+    @Override
+    public void updateState(BatteryTip tip) {
+        mState = tip.mState;
+    }
+
+    @Override
+    public void action() {
+        // do nothing
+    }
+
+    @Override
+    public Dialog buildDialog() {
+        //TODO(b/70570352): build the real dialog
+        return null;
+    }
+
+    /**
+     * Class representing app with high screen usage
+     */
+    public static class HighUsageApp implements Comparable<HighUsageApp> {
+        public final String packageName;
+        public final long screenOnTimeMs;
+
+        public HighUsageApp(String packageName, long screenOnTimeMs) {
+            this.packageName = packageName;
+            this.screenOnTimeMs = screenOnTimeMs;
+        }
+
+        @Override
+        public int compareTo(HighUsageApp o) {
+            return Long.compare(screenOnTimeMs, o.screenOnTimeMs);
+        }
+    }
+}