Bug 921918 part 1/2 - B2G MMS: support read report events. Interface changes. r=gene
Bug 921918 - 2/3: DOM implementation. r=vicamo
Bug Bug 921918 - 3.a/4: iccId is optional
Bug Bug 921918 - 3.b/4: assign received |aMmsMessage.sender| in mmdb.
Bug 921918 - 3.c/4: don't pass transactionId.
Bug 921918 - 3.d/4: construct mms deliveryInfo in db.
Bug 921918 part 3/3 - B2G MMS: When receiving a read report, notify Gaia SMS AP which receiver has read the MMS. r=vicamo