MMS: Update database message size info for retrived MMS

Get the message size value from M-Notification.Ind and
update message size of retrived MMS in db for both
Deferred Retrieval case and Immediate Retrieval case

CRs-fixed: 569584

Change-Id: Ib9395bd335fa0181b3f2df8d53b3b709979d4fb5
cherry picked from: Ib9395bd335fa0181b3f2df8d53b3b709979d4fb5