SystemUI: Make header image height offset user configurable [1/2]

BlissRoms Edit :
* adapt to tuner
* add some missing parts in QSCustomizer.

Change-Id: I32664f9274398f425a77b0e3c7160a45867113a9
Co-authored-by: rohan <purohit.rohan@gmail.com>
Signed-off-by: rohan <purohit.rohan@gmail.com>
5 files changed