CameraWrapper: set semc-focus-area correctly

When we touch the screen to set a focus area, this
parameter needs to be set to "user" instead of the
default value "center".
This is the behavior of stock Camera app, but it's
not making significant improvements here...just to
make sure it does not go wrong.

[mikeioannina]: Adjust to our wrapper style

Change-Id: I0bdf320067d571fdb5619a2a4ba1feb8ace15edf
camera: Cleanup code style

Change-Id: I82d16d068dd0f3e90223070bc218e51789c70caa
Bring back "old" ALS brightness values

Partially reverts commit fe81ae8

At now ALS reads lux value as before (as expected ?), and old
levels are more accurate for auto-brightness.

Change-Id: Ie5f71193e9143aaaac985b185cdcba6ae25be200
Switch default governor back to interactive
Interactive is messing up screen off playback