fb: update missing google UI changes for 4.4

thanks to kroz other things are now as well consistent to the new
google UI style

Change-Id: I604d29293b04bbcf279efd4d5bf2970ff8ee0c75
fb: follow on seekbars new UI guideline for 4.4

google forgot some things.....seekbar is one example

Change-Id: I996062a978322c93694e360dff1e4f42dc589062
fb: change alert dialog to new 4.4 UI guidelines and add

Holo / Holo.Light switch to reflect it proper on the
different app styles

Change-Id: I0fb7cd06d19a8eef66551e9f0281d60f33b2efe6
frameworks: Smooth background gradient

Credit to UBER for the images

Change-Id: I3655e9917610348100fa6cb5cede66a63ca82538