MSB-193: Modify CDR to differentiate Call types.

[abdulazizali77]

@gvagenas @maria-farooq George, Maria, please have a look, We basically need to differentiate types of calls and get metrics filtered by types of calls, this is related to https://docs.google.com/document/d/1RjTyfgntj2RZst54wUAJjgNq_XhOaOW_1tdqZKbLdVY/edit

I will possibly make amendments to UsageDao next