Update call to WallpaperPickerDelegate.initialize

If we pass "false" it has the same effect of what we were doing before
(that is, only reload if not initialized)

Bug: 155931313
Test: manual
Change-Id: I8135ae48c60db009f53252828e242d1af3b1248a
diff --git a/src/com/android/customization/picker/CustomizationPickerActivity.java b/src/com/android/customization/picker/CustomizationPickerActivity.java
index b54d24c..e6d22da 100644
--- a/src/com/android/customization/picker/CustomizationPickerActivity.java
+++ b/src/com/android/customization/picker/CustomizationPickerActivity.java
@@ -422,7 +422,7 @@
 
     @Override
     public void fetchCategories() {
-        mDelegate.initialize(!mDelegate.getCategoryProvider().isCategoriesFetched());
+        mDelegate.initialize(false);
     }
 
     @Override