HELLO EVERYONE, I'M HERE TO RESCUE YOU ALL!+1
Well its 2 years old this thread, but in want it too
I am still search for this
I saw this post and decided to try and fix it, so I've put together an APK that does this for you. You'll need to have the Xposed framework installed, which now exists for all versions of android that Face Unlock is available.
Here is a link to the Xposed module APK:
repo.xposed.info/module/com.samstenner.instantunlock
To those looking for a way of doing this without root/xposed, it's impossible. The app needs to have access to the Keyguard Monitor, as it needs to hook onto the 'notifyKeyguardChanged' method, which is ONLY possible using Xposed. I'm afraid my solution is the only way, unless Google changes the way Face Unlock works in the future.
Hope this helps you all out.
Sam
