Add flag (set to false for now) which will enable the use of the canvas renderer

Test: this flag is not yet used
Bug: 243402530
Change-Id: If1e732f1cb461c8538b97aff8003a7b913b946e7

packages/SystemUI/src/com/android/systemui/flags/Flags.java

@@ -186,6 +186,9 @@ public class Flags {
     // 801 - region sampling
     public static final UnreleasedFlag REGION_SAMPLING = new UnreleasedFlag(801);
 
+    // 802 - wallpaper rendering
+    public static final UnreleasedFlag USE_CANVAS_RENDERER = new UnreleasedFlag(802);
+
     /***************************************/
     // 900 - media
     public static final ReleasedFlag MEDIA_TAP_TO_TRANSFER = new ReleasedFlag(900);