Why doesn't a Sprite Renderer with a Mobile/Diffuse shader work on Android?

Why doesn't a Sprite Renderer with a Mobile/Diffuse shader work on Android?

A Sprite Renderer with the Mobile/Diffuse Shader works fine in the editor, but on my Nexus 7 it renders as a blank triangle, and on my Nexus 5 it doesn't render at all. I have tried several other Shaders including (not mobile) Diffuse, and the results are the same (except for Sprite/Default, which does work).

When I use the same Shaders on a Quad with a Mesh Renderer and the same input image, it works on my Android devices. Is there some trick to using different Shaders with a Sprite Renderer on Android?

Here is the Unity project: http://www.filedropper.com/androidshaders

Here is the output on my Nexus 7: (Sprite Renderer on top, Mesh Renderer on bottom) http://i.imgur.com/wSl4AxI.jpg

Here is the output on my Nexus 5: (Sprite Renderer on top, Mesh Renderer on bottom) http://i.imgur.com/TvVcbQ8.jpg