ASACORE-1170: Making Claiming of AllSeen Application optional

Create the DSA key pair at PermssionMgmtObj constructor to make
the public key available in the NotifyConfig signal.

Change-Id: I45bf9f1474df6214fd9e64292f7806dbeadffb36
Signed-off-by: Phil Nguyen <philn@qce.qualcomm.com>