public byte[] toByteArray(Bitmap bitmap) {
        ByteArrayOutputStream stream = new ByteArrayOutputStream();
        bitmap.compress(Bitmap.CompressFormat.JPEG, 80, stream);
        return stream.toByteArray();
    }
Retrieves <code>contact</code> for contact, or <code>null</code> if not
available.

@param contactId contact identifier, <code>recordID</code>
android/src/main/java/com/rt2zz/reactnativecontacts/impl/ContactsManagerImpl.java