add option to display navbar (2/2)

Change-Id: Idaf20f1a13db8045b5090fa9cf499ef33c5f790d
add battery bar (2/2)

Change-Id: I912449bf44386a19f1f174eb732c7d077805b4de
add disable bootanimation

Change-Id: I1bfb8215aecece77275998c9af3648ef8acb7c5e