Because my Samsung Galaxy J5 (2016) does not have the Trusted Face feature under "Smart Lock" menu I decided to install the APK manually, but unfortunately it crashed every time I opened it. After doing some research I found that the app requires some libraries, so I downloaded the Micro OpenGAPPS package for my Android version and I installed the necessary libraries and after a reboot it worked like a charm.
I created some flashable ZIPs for different Android versions which installs only the Trusted Face feature.
Download links: MOD Edit Links Removed
You should download the correct ZIP for your Android version in order to avoid any problems.
I'm NOT responsible for any damage caused to your device!