camera wrapper: initial commit

* We can now control lots of sony params, thus allowing
  finer control over the awesome cameras in our devices :-D

Features currently supported:
 * HDR (still picture)
 * ISO modes
 * Scene modes
 * Sony's image/video stablization

Note: This won't work the stock HAL, it needs a slightly
modified (read: hacked) HAL ;)

Change-Id: I27e83c3f7f760fde6df693382a1ebb1fb3b5762f