Slight tuning
Remove USE_CAMERA_STUB flag, move to vendor (kanged from CM)
jf: Add back unoffical api support for opencl and openvg.

http://www.anandtech.com/show/7191/android-43-update-for-nexus-10-and-4-removes-unofficial-opencl-drivers

Change-Id: Ib908b0c20c4bc8dd889d0d228ee3ea63820b98cf