Datawedge Demo is there please check
I found a solution do my problem. I came across this post (EMDK Barcode Sample app won't deploy to TC55 running Android 4.1.2 ) which helped me. Actually the Datawedge Demo is not there after a factory reset. So i had to install the EnterpriseEnabler first. Then after installing EMDK runtime, the Data Wedge Demo was there.