MMS: Fix Can't play audio or picture in MMS

The mLookupUri is null, the system failed to find an activity
to play audio file.

We should use the right uri passed to the ViewAttachmentListener
object as attachmentUri to set up the intent.

CRs-Fixed: 752430

Change-Id: I659d104b004318c98cffb0b4915ba55ff7d200d9