Battery drawable powersave tweaks

- No more fill protection around the plus sign
- slightly smaller plus sign
- fixed colorError in qs_theme

Test: visual
Fixes: 129482847
Change-Id: Ice318ef9be1f587fa7f1ef41196d16be4edb4255
diff --git a/packages/SystemUI/res/values/styles.xml b/packages/SystemUI/res/values/styles.xml
index a6a6e6b..7c123ef 100644
--- a/packages/SystemUI/res/values/styles.xml
+++ b/packages/SystemUI/res/values/styles.xml
@@ -316,6 +316,7 @@
     <style name="qs_theme" parent="@*android:style/Theme.DeviceDefault.QuickSettings">
         <item name="lightIconTheme">@style/QSIconTheme</item>
         <item name="darkIconTheme">@style/QSIconTheme</item>
+        <item name="android:colorError">@*android:color/error_color_material_dark</item>
         <item name="android:windowIsFloating">true</item>
     </style>