After testing, setting auto-focus (AF) and white-balance (WB) change
the color.
AF will be enabled during AF start (camera_af_start()). There is no
need to enable autofocus in setParameters. So, it is removed.
WB is "AUTO" by default. If WB setting is unchanged, do not set it
again.
Original author: wuchengli
Merged from: //branches/cupcake/...
Original author: android-build
Merged from: //branches/donutburger/...
Automated import of CL 143301
(and add a test that helped me debug it)
Original author: joeo
Merged from: //branches/cupcake/...
Original author: android-build
Merged from: //branches/donutburger/...
Automated import of CL 143279
