ported the oc_app calls

apps/admin_dependencies_chk/appinfo/app.php

apps/admin_dependencies_chk/settings.php

apps/admin_migrate/appinfo/app.php

apps/bookmarks/appinfo/app.php

apps/bookmarks/index.php

apps/calendar/appinfo/app.php

apps/calendar/index.php

apps/calendar/lib/search.php

apps/contacts/ajax/uploadimport.php

apps/contacts/appinfo/app.php

apps/contacts/import.php

apps/contacts/index.php

apps/contacts/lib/app.php

apps/contacts/lib/search.php

apps/contacts/lib/vcard.php

apps/external/appinfo/app.php

apps/external/index.php

apps/files/admin.php

apps/files/appinfo/app.php

apps/files/index.php