Updating data for user friends according to privacy

- Fixed a bug where the status of a friend is not changed locally when
user favourite or unfavourite a user
- Made two functions on the server side to update the data of the user
to his friends according to the privacy of each value in each field
- Mapping of values to update with pins of users that are eligible to
receive this update value
- Updates are now functioning on deleting or adding updates on the
following fields:
1- fullName
2- gender
3- phone_numbers
4- mails