Update the API documentation for secure storage
Update the API documentation for secure storage

The client is killed by server when some parameter are bad
for functions Write, Read and Delete.

Resolves: LE-6405
Change-Id: Icad557672219420372ed915a2f17274c30909202

legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af