Correct attachment type for Mms only has subject

Mark the attachment type of Mms only has subject as TEXT
avoid to show Mms View as untimely

Change-Id: I346ae4af4983e9e8dbe9533eeddef445affc339a
Signed-off-by: Roger Chen <cxr514033970@gmail.com>
After we add many of contacts in the recipient editor, inputing character will be very slowly.
Signed-off-by: annieyu <annieyu@huaqin.com>

Change-Id: I1aab6f7b84500ab41e8c274fbac8dc2a1a608a08