[flutter] ListTile에 background 및 여백 적용

Container를 씌워주자

 Container(
    color: Colors.white70,//배경색
    margin: EdgeInsets.symmetric(horizontal: 20.0, vertical: 5),
    child:ListTile(
       leading: CircleAvatar(
                  backgroundImage: NetworkImage(photoUrl),
                ),
       title:Text(ProfileList[index]['id']),
       onTap: (){ },
 )