systemui:fix notification panel layout overlap & add new halo switcher

move notification header halo switcher to notification panel
add text syle halo switch button
hide (emergency calls only) text from notification panel
halo button pb support

before : https://dl.dropboxusercontent.com/u/62249445/_20140310_034542.JPG

after  : https://dl.dropboxusercontent.com/u/62249445/_20140310_041719.JPG