MMS: Fix The slideshow can't be shown in the message

After the MessageItem Pdu Loaded, the MessageItem's AttachmentType
might have changed. So precisely, it's not the same MessageItem
anymore.Since it's not the same MessageItem, we should setImage,
and the slideshow will be shown normally.

After Pdu Loaded, when bindCommonMessage again, the sameItem
argument should be false, because it's not the same MessageItem
anymore.

CRs-Fixed: 548610

Change-Id: Id25bdfb1acc954d244ec3a8585fa1b0daa379d0f
Fix to return to previous activity when a sms/mms notification is selected.

When an MMS/SMS is received, the TaskStack is rebuilt
when displaying the notification.
Do not alter the TaskStack.

Change-Id: I8302ab5a4627f423ba787a327ee757165a4f0e83
CRs-Fixed: 580341