Fix bitmap in clusterObject which should directly use mask instead asOffset (#11816)

Author: yunhanw-google

src/app/zap-templates/templates/app/cluster-objects.zapt

@@ -42,7 +42,7 @@ using {{asType label}} = EmberAf{{asType label}};
 // Bitmap for {{label}}
 enum class {{asType label}} : {{asUnderlyingZclType type}} {
 {{#zcl_bitmap_items}}
-k{{asUpperCamelCase label}} = {{asOffset mask}},
+k{{asUpperCamelCase label}} = {{asHex mask}},
 {{/zcl_bitmap_items}}
 };
 {{/zcl_bitmaps}}