Update advanced battery screen to use headline font.

Change-Id: I8e70cc8093cccbe67b7c363a60a03f0eb1cda2e5
Fixes: 62507326
Test: robotests

res/layout/battery_usage_graph.xml

@@ -28,6 +28,7 @@
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:layout_marginBottom="16dp"
+        android:fontFamily="@*android:string/config_headlineFontFamily"
         android:textAppearance="?android:attr/textAppearanceLarge"
         android:textSize="36sp"
         android:textColor="?android:attr/colorAccent" />

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

@@ -31,6 +31,7 @@ import com.android.settings.R;
 import com.android.settings.testutils.SettingsRobolectricTestRunner;
 import com.android.settings.TestConfig;
 import com.android.settings.graph.UsageView;
+import com.android.settings.testutils.shadow.SettingsShadowResources;
 
 import org.junit.Before;
 import org.junit.Test;
@@ -42,7 +43,11 @@ import org.robolectric.annotation.Config;
 
 
 @RunWith(SettingsRobolectricTestRunner.class)
-@Config(manifest = TestConfig.MANIFEST_PATH, sdk = TestConfig.SDK_VERSION)
+@Config(manifest = TestConfig.MANIFEST_PATH, sdk = TestConfig.SDK_VERSION,
+        shadows = {
+                SettingsShadowResources.class,
+                SettingsShadowResources.SettingsShadowTheme.class
+        })
 public class BatteryHistoryPreferenceTest {
     @Mock
     private PreferenceViewHolder mViewHolder;