Android : How to enable USB Bluetooth dongle support on Android 4.2.2

I am trying to enable bluetooth usb dongle support on our android device which is default has no bluetooth option.

I have tried to follow this guide which is for specific AM335 bluetooth device.

First i have enabled all the options on kernel as follow

[*] Networking support  ---> 
   <*>   Bluetooth subsystem support  --->
       [*]   L2CAP protocol support
       <*>   RFCOMM protocol support
       <*>   RFCOMM protocol support
       <*>   BNEP protocol support
       [*]     Multicast filter support
       [*]     Protocol filter support 
       <*>   HIDP protocol support 
             Bluetooth device drivers  --->
               <*> HCI UART driver
               [*]   UART (H4) protocol support 
               [*]   HCILL protocol support
   <*>   RF switch subsystem support    

Guide says i need to make changes on init.rc file.

There are lots of init.rc file on my device directory like init.[mydevice].rc init.[mydevice].usb.rc etc and the original android init.rc file which is not on my device directory but on platform/system/core/rootdir

My first question is which init.rc file should i apply the changes guide say?

Guide is not for USB dongle and i need to find where my usb dongle connects on android filesystem in order to give correct permissions.

chmod 0660 /dev/ttyO1
chown bluetooth bluetooth /dev/ttyO1

my second question is what should i write instead of tty01?

Also there is no bluetoothd service on my device as far as i can see from adb shell service list(I think there is something missing on init.rc file which creates dir for bluetoothd). I have enabled the bluetooth option in settings and can navigate to it without problem but when i enabled the bluetooth device is trying to enable it but couldnt succeed at all.

Later i suspected that maybe i couldnt enable the usb driver from kernel and try to list the usb devices by lsusb with and without usb dongle results are same so i think device cant recognise the usb dongle at all. And there is whole bluedroid thing that i dont know too.

My third and last question is: Is there any other thing should i enable or disable on kernel besides what i have already changed?