New API for registering app permissions.

New API for registering app permissions.

[Issue#]        SSDWSSP-620
[Bug/Feature]   Add new API in libprivilege-control and use it in
                security-server.
[Cause]         There is a need to prepare changes for installers team
                regarding usage of perm_app_setup_permissions function.
[Solution]      Function perm_app_setup_permissions (former
                perm_app_register_permissions) is intended to
                add persistent permissions during installation process.
                Function perm_app_enable_permissions from now on should
                not be used for initial addition of app permissions.
                Dependencies:
                security-tests:
                I18ddd5d286988584cd822a4b929419c8bc1c6102
[Verification]  Build, install, run tests.

Change-Id: I4a14b0f91a5bc7e358339cacb5b93fcf234935eb