oxygen-rom-ics/android_packages_apps_camera — comment on commit c06e856f2cf7d5196c7cd26a98772576384c8f21
File:  line 0
By thalamus:

This just initialises the variable as true. It doesn't enable face detection, in fact it will completely stop face detection from working, due to the code here:
https://github.com/oxygen-rom-ics/android_packages_apps_camera/blob/c06e856f2cf7d5196c7cd26a98772576384c8f21/src/com/android/camera/Camera.java#L525