[Thread] create dir /dev/socket/ot-daemon

ot-daemon may use multiple unix sockets so create a dir for it.

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

Change-Id: I43ccb11ed664cf0d59fc02e2efc721ed7284e2a0
diff --git a/rootdir/init.rc b/rootdir/init.rc
index 6b783fa..768e0ff 100644
--- a/rootdir/init.rc
+++ b/rootdir/init.rc
@@ -109,6 +109,9 @@
     symlink /proc/self/fd/1 /dev/stdout
     symlink /proc/self/fd/2 /dev/stderr
 
+    # Create socket dir for ot-daemon
+    mkdir /dev/socket/ot-daemon 0770 thread_network thread_network
+
     # Create energy-aware scheduler tuning nodes
     mkdir /dev/stune/foreground
     mkdir /dev/stune/background