fix desktop and liveview compilation

packages/liveview/src/element.rs

@@ -16,8 +16,8 @@ impl LiveviewElement {
 }
 
 impl RenderedElementBacking for LiveviewElement {
-    fn get_raw_element(&self) -> dioxus_html::MountedResult<&dyn std::any::Any> {
-        Ok(self)
+    fn as_any(&self) -> &dyn std::any::Any {
+        self
     }
 
     fn get_client_rect(