Add support for experimental xx_foreign_toplevel_geometry_tracker_v1 as

well as tracking_manager_v1.

wire/xx_foreign_toplevel_geometry_tracking_manager_v1.txt

@@ -0,0 +1,7 @@
+request destroy (destructor) {
+}
+
+request get_geometry_tracker {
+    tracker: id(xx_foreign_toplevel_geometry_tracker_v1) (new),
+    toplevel: id(ext_foreign_toplevel_handle_v1),
+}