Settings: statusbar reflect am/pm based on the global user settings 12h/24h format (2/2)

for statusbar.

As well fetch the correct color from systemUI

Change-Id: I0dc73b57812a02d3ebba1d5417d03fd2cf5de810
Settings: fetch navbar color from systemUI

for better theme support on our new theme engine

Change-Id: I15ef4529578ed6260042c14c3c330bd2153ca561