The iOS SDK is just that, for iOS. It's based on FileMaker Go, which is a separate app in itself. I doubt you would have much luck converting things over using a 3rd party service given the very specific functionality of filemaker. AFAIK, aside from redeveloping your app ground up specifically for android, there is no shortcut that will convert your filemaker file over.
Android, however, is supported via WebDirect. So you may be able to write a fairly simple app for android that connects users to WebDirect.