I have a problem in a development of my rom

I am developing a custom rom for my LG G PRO LITE D682 , but in the sound settings doesnt appear ringston but in a my folder rom i have the media folder !!!! help !!!
Now im posted scheme of my rom and the folders that I deleted from my rom

ROM FOLDER
{
app
bin
etc
fonts
framework
lib
media
usr
xbin
build.prop
}



folders deleted in my rom
{
apps
cust
data
mobile_toolkit
priv-app
res
secro
sounds
tts
vendor
}