hwui: Disable partial invalidations

The property to disable usage of dirty regions has changed, adjust
to the current one to fully disable them.

Change-Id: Iabe4d57a4f6ccd99ae7cae798c7dce76a02580cd
Merge branch 'cm-10.2' of git://github.com/CyanogenMod/android_device_samsung_smdk4412-common into cm-10.2