Change the way camera format is selected.
Change the way camera format is selected.

Build list of supported formats before starting directshow graph.
Select first available format supported by both device and surface.
Force DirectShow to do color space conversion instead of using QImage.

Change-Id: I8f946cc7c2693eea0135981e899003b453bd8784
Reviewed-by: Michael Goddard <3ec82c9d770214b86c58e0ffe200ac64c3ff8da3@nokia.com>
Reviewed-by: Jonas Rabbe <6e9178b26dba0cd114a9aed0874c56cbbaba6438@gmail.com>
Reviewed-by: Dmytro Poplavskiy <72e04cfb587e72184d425a79cb5cea0021f0b982@nokia.com>

mer-qt/qtmultimedia,webOS-ports/qtmultimedia,jfaust/qtmultimedia,webOS-ports/qtmultimedia,sergiusens/qtmultimedia,jfaust/qtmultimedia,sergiusens/qtmultimedia,nezticle/qtmultimedia,mer-qt/qtmultimedia,mer-qt/qtmultimedia,webOS-ports/qtmultimedia,nezticle/qtmultimedia,webOS-ports/qtmultimedia,mer-qt/qtmultimedia,webOS-ports/qtmultimedia,sergiusens/qtmultimedia,jfaust/qtmultimedia,jfaust/qtmultimedia,mer-qt/qtmultimedia,nezticle/qtmultimedia,nezticle/qtmultimedia,nezticle/qtmultimedia,jfaust/qtmultimedia,sergiusens/qtmultimedia,sergiusens/qtmultimedia