[Expressive Battery] Tweak the animation of Battery Usage screen.

Fix the blinking while tapping chart to select time intervals.
- setHasStableIds(true) to avoid BatteryChartView create viewHolder again when SettingsPreferenceGroupAdapter invoke notifyDataSetChanged()

Recover the fade-in animation when display the hourly chart for the first time.
- set the default alpha of hourly chart in xml to 0.

Bug: 378997970
Bug: 349652542
Flag: EXEMPT bug fix
Test: visual
Change-Id: Ia6c131452fca65db7149664c7e18ca68e9703def

res/layout/battery_chart_graph.xml

@@ -53,6 +53,7 @@
             android:layout_height="@dimen/chartview_layout_height"
             android:layout_marginBottom="16dp"
             android:visibility="gone"
+            android:alpha="0"
             android:contentDescription="@string/hourly_battery_usage_chart"
             android:textAppearance="?android:attr/textAppearanceSmall"
             settings:textColor="?android:attr/textColorSecondary" />

src/com/android/settings/fuelgauge/batteryusage/PowerUsageAdvanced.java

@@ -32,6 +32,8 @@ import android.util.Pair;
 import androidx.annotation.VisibleForTesting;
 import androidx.loader.app.LoaderManager;
 import androidx.loader.content.Loader;
+import androidx.preference.PreferenceScreen;
+import androidx.recyclerview.widget.RecyclerView;
 
 import com.android.settings.R;
 import com.android.settings.SettingsActivity;
@@ -149,6 +151,13 @@ public class PowerUsageAdvanced extends PowerUsageBase {
         }
     }
 
+    @Override
+    protected RecyclerView.Adapter onCreateAdapter(PreferenceScreen preferenceScreen) {
+        final RecyclerView.Adapter adapter = super.onCreateAdapter(preferenceScreen);
+        adapter.setHasStableIds(true);
+        return adapter;
+    }
+
     @Override
     protected List<AbstractPreferenceController> createPreferenceControllers(Context context) {
         final List<AbstractPreferenceController> controllers = new ArrayList<>();