Smear screen power usage based on activity time.

Bug: 38328636
Test: RunSettingsRoboTests
Change-Id: I8e7baadcd88a8e9d674f5bc8d8e42e0f3953c98a

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

@@ -287,7 +287,7 @@ public class PowerUsageSummary extends PowerUsageBase {
                 item.setTitle(mShowAllApps ? R.string.hide_extra_apps : R.string.show_all_apps);
                 metricsFeatureProvider.action(context,
                         MetricsEvent.ACTION_SETTINGS_MENU_BATTERY_APPS_TOGGLE, mShowAllApps);
-                refreshUi();
+                restartBatteryStatsLoader();
                 return true;
             default:
                 return super.onOptionsItemSelected(item);