I own one plus 3 after usage of 1 day I found something like face detection lock but

I own one plus 3 after usage of 1 day I found something like face detection lock but I don't know how to use

Which ROM with "Ok Google detection from Any screen" Work ?

Sorry for my english
I need Rom with ok google detection from any screen
I tried CM13, but "detection from any screen" option is missing
Any recc?
I need Android 5.1 / 6.0

Thanks Anyway