Hide summary for Google app in battery usage

"Google" app is quicksearchbox which always has a foreground service running.
This causes it shows a huge usage time.
So, we make the summary invisible now.

Test: Rebuild and visual
Change-Id: Iba8083cc058e1d391dc20610fb6eb140c2c25350
Fix: 144063003

res/values/arrays.xml

@@ -1436,4 +1436,10 @@
         <item>@string/enhanced_4g_lte_mode_summary_4g_calling</item>
     </string-array>
 
+    <!-- A whitelist which packages won't show summary in battery usage screen.  [CHAR LIMIT=NONE] -->
+    <string-array name="whitelist_hide_summary_in_battery_usage" translatable="false">
+        <!-- Google -->
+        <item>"com.google.android.googlequicksearchbox"</item>
+    </string-array>
+
 </resources>

src/com/android/settings/fuelgauge/BatteryAppListPreferenceController.java

@@ -338,7 +338,7 @@ public class BatteryAppListPreferenceController extends AbstractPreferenceContro
     void setUsageSummary(Preference preference, BatterySipper sipper) {
         // Only show summary when usage time is longer than one minute
         final long usageTimeMs = sipper.usageTimeMs;
-        if (usageTimeMs >= DateUtils.MINUTE_IN_MILLIS) {
+        if (shouldShowSummary(sipper) && usageTimeMs >= DateUtils.MINUTE_IN_MILLIS) {
             final CharSequence timeSequence =
                     StringUtil.formatElapsedTime(mContext, usageTimeMs, false);
             preference.setSummary(
@@ -390,6 +390,19 @@ public class BatteryAppListPreferenceController extends AbstractPreferenceContro
         }
     }
 
+    private boolean shouldShowSummary(BatterySipper sipper) {
+        final CharSequence[] whitelistPackages = mContext.getResources()
+                .getTextArray(R.array.whitelist_hide_summary_in_battery_usage);
+        final String target = sipper.packageWithHighestDrain;
+
+        for (CharSequence packageName: whitelistPackages) {
+            if (TextUtils.equals(target, packageName)) {
+                return false;
+            }
+        }
+        return true;
+    }
+
     private static boolean isSharedGid(int uid) {
         return UserHandle.getAppIdFromSharedAppGid(uid) > 0;
     }

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

@@ -25,7 +25,6 @@ import static org.mockito.Mockito.spy;
 import static org.mockito.Mockito.when;
 
 import android.content.Context;
-import android.content.pm.ModuleInfo;
 import android.content.pm.PackageManager;
 import android.os.BatteryStats;
 import android.os.UserManager;
@@ -40,7 +39,6 @@ import com.android.settings.R;
 import com.android.settings.SettingsActivity;
 import com.android.settings.core.InstrumentedPreferenceFragment;
 import com.android.settings.testutils.FakeFeatureFactory;
-import com.android.settingslib.applications.ApplicationsState;
 
 import org.junit.Before;
 import org.junit.Test;
@@ -49,10 +47,6 @@ import org.mockito.Mock;
 import org.mockito.MockitoAnnotations;
 import org.robolectric.RobolectricTestRunner;
 import org.robolectric.RuntimeEnvironment;
-import org.robolectric.util.ReflectionHelpers;
-
-import java.util.ArrayList;
-import java.util.List;
 
 @RunWith(RobolectricTestRunner.class)
 public class BatteryAppListPreferenceControllerTest {
@@ -161,6 +155,19 @@ public class BatteryAppListPreferenceControllerTest {
         assertThat(mPreference.getSummary().toString()).isEqualTo("Used for 2 min");
     }
 
+    @Test
+    public void testSetUsageSummary_timeMoreThanOneMinute_GoogleApp_shouldNotSetScreenSummary() {
+        mNormalBatterySipper.usageTimeMs = 2 * DateUtils.MINUTE_IN_MILLIS;
+        mNormalBatterySipper.packageWithHighestDrain = "com.google.android.googlequicksearchbox";
+        doReturn(mContext.getText(R.string.battery_used_for)).when(mFragment).getText(
+                R.string.battery_used_for);
+        doReturn(mContext).when(mFragment).getContext();
+
+        mPreferenceController.setUsageSummary(mPreference, mNormalBatterySipper);
+
+        assertThat(mPreference.getSummary()).isNull();
+    }
+
     @Test
     public void testSetUsageSummary_timeMoreThanOneMinute_hiddenApp_setUsedSummary() {
         mNormalBatterySipper.usageTimeMs = 2 * DateUtils.MINUTE_IN_MILLIS;