SAP: Proper device name in high security pairing dialog box

In the pairing dialog box, there is no editable text option for the caption, hence
we need to use static string which was appearing as junk characters sticking with
the remote device name which is is already displayed in next line so no need to use
dynamic string again anyways.

Change-Id: I45c4b3ebcabd38dff6ee84a82fd6fe082f36400f
CRs-fixed: 735774