Enable ZSL

Move overlay from Gallery2 to Camera2, and remove all the options except
enable zsl since the rest don't exist (anymore/yet)

Change-Id: I8973e5760cda36d19ff90d4c16ef3c70075c9fe8
Merge branch 'cm-11.0' of github.com:CyanogenMod/android_device_samsung_d2-common into cm-11.0