dlx: camera: We really, really don't want face-detection

The camera crashes when first switching to a 16:9 picture
resolution and the stack trace seems to indicate face-detection
is being attempted.

Tell is definitively not to do face-detection.

Change-Id: Id988a59e9db273a6f2b3bb76437177e084baf6af
Merge branches 'cm-11.0' and 'cm-11.0' of https://github.com/CyanogenMod/android_device_htc_dlx into cd-4.4