Use AVD files for wireless charging animation

- use avd files instead of programatically drawing animation

Test: manual
Change-Id: I387080a0e8412fecdf7d935c0ab26f3d5e9f02cc
diff --git a/packages/SystemUI/res/values/styles.xml b/packages/SystemUI/res/values/styles.xml
index 5a03c4a..c0b50ea 100644
--- a/packages/SystemUI/res/values/styles.xml
+++ b/packages/SystemUI/res/values/styles.xml
@@ -524,4 +524,16 @@
         <item name="rotateButtonScaleX">-1</item>
     </style>
 
+    <!-- Used to style charging animation AVD animation -->
+    <style name="ChargingAnim" />
+
+    <style name="ChargingAnim.WallpaperBackground">
+        <item name="chargingAnimColor">?attr/wallpaperTextColor</item>
+        <item name="android:textColor">?attr/wallpaperTextColor</item>
+    </style>
+
+    <style name="ChargingAnim.DarkBackground">
+        <item name="chargingAnimColor">@android:color/white</item>
+        <item name="android:textColor">@android:color/white</item>
+    </style>
 </resources>