There are no camera apps for Android that can take pictures in that resolution.
Your photo camera that does it, cant really either - all it does is crop the picture afterwards in software, but the picture itself is taken natively in 4:3 aspect
There are no camera apps for Android that offer that option, so we cant really help you with that part.
If you want pictures in that resolution (or rather in 16:9 aspect) you will have to crop them yourself using a picture editor after they are taken. There are a number of photo editors for Android that will crop pictures on your phone, for instance "Photo Enhance" which will let you crop pictures in different fixed aspect ratios, including 16:9 widescreen. You need the paid version to save pictures in high resolution.
Else try and look at some of the other editors - heres a list of some
PS: You can offcource also crop and resize your pictures using a picture editor on your computer and then transfer them back to the phone again after cropping and resizing