text: Title: Cannot set show_api to False in mount_gradio_app
  Body: ### Describe the bug
  
  I create a gradio app using mount_gradio_app so I don't need to user the launch function call. I want to hide the "Use via API" on the footer. I try to add app_kwargs={"show_api": False} when calling the mount_gradio_app() and the "Use via API" message still shown on the footer.
  
  ### Have you searched existing issues?  🔎
  
  - [X] I have searched and found no existing issues
  
  ### Reproduction
  
  ```python
  import gradio as gr
  
  ```
  
  
  ### Screenshot
  
  _No response_
  
  ### Logs
  
  _No response_
  
  ### System Info
  
  ```shell
  5.5.0
  ```
  
  
  ### Severity
  
  Blocking usage of gradio