fs.mitm: Try to MitM titles that have override RomFS content on the SD card

stratosphere/fs_mitm/source/fsmitm_utils.hpp

@@ -15,4 +15,6 @@ class Utils {
         
         static Result OpenRomFSFile(FsFileSystem *fs, u64 title_id, const char *fn, int flags, FsFile *out);
         static Result OpenRomFSDir(FsFileSystem *fs, u64 title_id, const char *path, FsDir *out);
+        
+        static Result HasSdRomfsContent(u64 title_id, bool *out);
 };