Bluetooth: Set folder depth 0 to fix IOT browsing issue

Some carkits try to do Change path when folder depth is 1 in
setBrowsePlayer resp assuming folder depth 1 is not the root
folder. DUT responds to change path with folder doesnot exit as a
result remote does not send GetFolderItem cmd.

Change-Id: I3689bbeebde1c1549924a3807ff39db7e5b33f74
CRs-fixed: 918831