Merge "Use drawn state to present sync state of wallpaper" into main

services/core/java/com/android/server/wm/WallpaperWindowToken.java

@@ -273,6 +273,12 @@ class WallpaperWindowToken extends WindowToken {
         return isClientVisible();
     }
 
+    @Override
+    boolean isSyncFinished(BLASTSyncEngine.SyncGroup group) {
+        // TODO(b/233286785): Support sync state for wallpaper. See WindowState#prepareSync.
+        return !mVisibleRequested || !hasVisibleNotDrawnWallpaper();
+    }
+
     @Override
     public String toString() {
         if (stringName == null) {