I tried it from my Nexus 5, with 4.4.2 and the fresh Camera app, but:
I can not upload an image, what I created earlier -> no depth map found (yes, I used Lens blur to take this photo)
I can not take a new photo, I have 3 options to add a new photo: Camera/Camcorder/Document. The first is opening the Camera app, but not in Lens Blur mode and the option to change in not available.
I tried it from my Nexus 5, with 4.4.2 and the fresh Camera app, but: