More misc inspection stuff

git-svn-id: http://zxing.googlecode.com/svn/trunk@2862 59b500cc-1b3d-0410-9834-0bbf25fbcc57
If camera fails to support its supported and chosen preview mode, use its actual setting

git-svn-id: http://zxing.googlecode.com/svn/trunk@2863 59b500cc-1b3d-0410-9834-0bbf25fbcc57