Function safe_app::ffi::cipher_opt::cipher_opt_new_symmetric

#[no_mangle]
pub unsafe extern "C" fn cipher_opt_new_symmetric(
    app: *const App, 
    user_data: *mut c_void, 
    o_cb: extern "C" fn(user_data: *mut c_void, result: *const FfiResult, handle: CipherOptHandle)
)

Construct CipherOpt::Symmetric handle.