Add BatteryMeterView in Settings

1. Show gauge icon at the top of battery main page instead of
battery usage graph.
2. Move the click action from battery usage graph to gauge icon.

Bug: 34387464
Test: RunSettingsRoboTest

Change-Id: Ib182619d6805b401cde03a50e2ae907cf4df7b94

tests/robotests/src/com/android/settings/fuelgauge/BatteryMeterViewTest.java

@@ -0,0 +1,65 @@
+/*
+ * Copyright (C) 2017 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;
+
+import android.content.Context;
+import com.android.settings.SettingsRobolectricTestRunner;
+import com.android.settings.TestConfig;
+import com.android.settings.testutils.shadow.SettingsShadowResources;
+import com.android.settings.testutils.shadow.SettingsShadowResources.SettingsShadowTheme;
+import com.android.settings.testutils.shadow.ShadowDynamicIndexableContentMonitor;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+import org.robolectric.RuntimeEnvironment;
+import org.robolectric.annotation.Config;
+
+import static org.mockito.Mockito.verify;
+
+@RunWith(SettingsRobolectricTestRunner.class)
+// TODO: Consider making the shadow class set global using a robolectric.properties file.
+@Config(manifest = TestConfig.MANIFEST_PATH,
+        sdk = TestConfig.SDK_VERSION,
+        shadows = {
+                SettingsShadowResources.class,
+                SettingsShadowTheme.class,
+                ShadowDynamicIndexableContentMonitor.class
+        })
+public class BatteryMeterViewTest {
+    private static final int BATTERY_LEVEL = 100;
+    @Mock
+    private BatteryMeterView.BatteryMeterDrawable mDrawable;
+    private Context mContext;
+    private BatteryMeterView mBatteryMeterView;
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+
+        mContext = RuntimeEnvironment.application;
+        mBatteryMeterView = new BatteryMeterView(mContext);
+        mBatteryMeterView.setBatteryDrawable(mDrawable);
+    }
+
+    @Test
+    public void testSetBatteryInfo_SetCorrectly() {
+        mBatteryMeterView.setBatteryInfo(BATTERY_LEVEL);
+
+        verify(mDrawable).setBatteryLevel(BATTERY_LEVEL);
+    }
+}