[DEV](iOS) add LIST command error response implementation (not existing directory case)
[DEV](iOS) add LIST command error response implementation (not existing directory case)

Change-Id: I2467e8709e6fe63146444e73d9e05589e42d6988

Parrot-Developers/libARUtils,Parrot-Developers/libARUtils,Parrot-Developers/libARUtils