vendor.qti.iwlan
vendor.qti.iwlan
Used for VoLTE/VoWifi (Wifi-calling)
IwLAN = Interworking wLAN.
Support for mobile data offloading (use of complementary network technologies for delivering data originally targeted for cellular networks)
It means your phone will use the Wi-Fi connection instead of the cellular data connection.
https://en.wikipedia.org/wiki/Mobile_data_offloading