Remove "Add phone# to people" context menu after adding.

By long pressing phone number content in message thread, selecting
"Add phone number to people" option and adding number to Contacts.
Do the procedure again, "Add phone number to people" option still there.
This is because asynchronous get function is used which lead to get wrong
contact information. By calling block mode function to fix this issue.

Change-Id: Id8c6318bfd1ab7eeb846888e185872e8009baf87
Signed-off-by: vincent <vincentcho.cho@gmail.com>