Mms: Draft still exists after forwarding mms

The draft still exists after forwarding mms to the same
sender

Forward message will be saved as draft before sent, and it will reload
this draft after come back to the current thread.

Do not load the draft for the same recipient address when forwarding
mms.

Change-Id: I2b21fb527f00959ae9608675226b72d3ce85cb56
Merge "Mms: Draft still exists after forwarding mms" into du44