Use Google Photos from the Camera App on the Samsung Galaxy S7

Is it possible to make sure that the default camera app on the Galaxy S7 uses Google Photos instead of Samsung Gallery?

I like the pre-installed camera app, but pressing the thumbnail icon in the interface will always open the Samsung Gallery, even though I've set Google Photos as the default app for displaying photos.

For newer devices, the creation of a "shortcut to an application" has been recommended in various articles and discussion forums (for example, at lifehacker.com). This does not seem to be available on the Galaxy S7.