I think you need to be BI Administrator.
You have to be member of the BI Administrator role.
Ref. official documentation here: http://docs.oracle.com/cd/E23943_01/bi.1111/e10544/appuir.htm#BIEUG10056
User View — Defaults to User View. You can select Admin View if you have administrative permissions. Admin View enables you to perform all administrative tasks and access the catalog root folders, which provide detailed information about all users and system objects.
There isn't an explicit privilege for this. Too dangerous to give to anyone below full and actual admin rights.