Multi user features :

->Use Usr App related fonctions instead of Global App related Functions

Signed-off-by: Sabera Djelti (sdi2) <sabera.djelti@open.eurogiciel.org>
prefer 
```
    int ret = (uid != GLOBAL_USER) ?
              pkgmgrinfo_appinfo_get_usr_appinfo(app_id.c_str(),
                                                 uid, &appinfo_handle) :
              pkgmgrinfo_appinfo_get_appinfo(app_id.c_str(),
                                             &appinfo_handle);
```