Fetch proper Originator/Recipient name from application parameter

Add change to fetch actual string provided in application parameter
OBEX header for originator/Recipient name. If proper taglength is
not provided to fetch the string value, then junk characters will be
appended at the end of string, which will not allow us to filter
the messages based on originator/recipient name.

Change-Id: I387a4763fcd8dfbb71de07f80f5e19d90e0db5f1
CRs-fixed: 582947