Camera focal length & CCD sensor width

I was wondering if any body would know the CCD width and focal length that is in a Kindle Fire 7" tablet or what settings
would work. I have a short video I shot with it. It shoots the video in 720p. I tried to look up the info online but can’t find
anything. I played around in the setting in motion tracking, but haven’t found one that works yet. So I has hope maybe some one here could help. Thanks