camera: add exposure hack for d2

* d2's hal is reporting unusable exposure values
* use sane values to make shit work

Change-Id: I0d1313db1da56bfec553ef09df601626342ab55e
Merge branch 'cm-11.0' of https://github.com/CyanogenMod/android_device_samsung_msm8960-common into android-4.4