[Thread] create socket dev/socket/ot-daemon/thread-wpan.sock

Creates the /dev/socket/ot-daemon/thread-wpan.sock socket from the
service init file. This is required for communication between ot-ctl
and ot-daemon service

Bug: 320451788
Test: verified that ot-daemon can create socket
/dev/socket/ot-daemon/thread-wpan.sock

Change-Id: Ib2111d67d2ce6726158f02a2cb2310c7ba9bf270