i9082: fix ISO values in Camera

String "pref_camera_iso_value_auto" is no longer available - https://github.com/CyanogenMod/android_packages_apps_Camera2/commit/2648013c9f76c1fb304e897b913086457dc9b3de#diff-b2ba26f4eb2c40130f2c311d9d93f888L221

https://github.com/CyanogenMod/android_packages_apps_Camera2/blob/cm-11.0/res/values/qcomarrays.xml#L389