fb: correct seeker fb style for 4.4

based on this commit https://github.com/SlimRoms/frameworks_base/commit/a845169c128c19825a69a0ebdf2e4d366fdd67ad

the idea was good but bad done. A middle in the night action lol.
Problem is that holo light themed app cannot handle the white seekbar of course
So add the complete seekbar into the Holo.Light switch to support both cases

Holo: white seekbar
Holo.Light: drak gray seekbar

Change-Id: I82252d0cb30cd4af47d624a37ccc904cb7e9c1e6