Google and Flicker are not the best image libraries to be included as there is a chance that the image owner may not have uploaded the image and given permission for commercial use. Integrating an image search from Unsplash, Pexels or Pixabay will result in always using royalty free images.  They have an API to integrate. 

Would also love to have the same for Giphy to upload gifs through search. They also have an API