Fix UI flashes issue when entering to the app in the cold start am: 5b27fd923a

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Settings/+/14456007

Change-Id: Iedd26345a81b048d08b72a2e9588e8b9d852b250

res/layout/battery_chart_graph.xml

@@ -36,6 +36,7 @@
         android:layout_width="match_parent"
         android:layout_height="165dp"
         android:layout_marginBottom="16dp"
+        android:visibility="invisible"
         android:textAppearance="?android:attr/textAppearanceSmall"
         settings:textColor="?android:attr/textColorSecondary" />
     <TextView

res/xml/power_usage_advanced.xml

@@ -25,8 +25,7 @@
         android:key="battery_graph"/>
 
     <PreferenceCategory
-        android:key="app_list"
-        android:title="@string/power_usage_list_summary"/>
+        android:key="app_list"/>
 
     <com.android.settingslib.widget.FooterPreference
         android:title="@string/battery_usage_screen_footer"