SystemUI: allow for the clock to be centered (2 of 2)

    This allows the clock to be centered and does
    not break the normal functionality of the status bar.
    Overflow for status bar icons is adjusted accordingly
    when the clock is centered. The clock slides in/out
    when centered and the ticker is running.

Change-Id: I4f71263d94128619e3347585e188b29ab3a7f19b
SuperSU header
[2/2] Profile: Remove screen lock mode
[2/2] Profile: Screen timeout
[2/2] Buttons: Switch to last app
[2/2] Buttons: Immersive mode
[2/2] Quick pulldown: center
[2/2] Smart pulldown
[2/2] Volume panel timeout
[2/2] Global actions: Mobile data
[2/2] Global actions: Wifi
[2/2] NavBar: Enable with s-pen
[2/2] Battery light: Quiet hours & 100% charged
[2/2] Low battery warning policy
[2/2] Network traffic indicator
[2/2] Floating window
[2/2] Lockscreen notifications
[2/2] Slim Recents