SnapdragonCamera: Handle cam switch icon if numOfCams less than 2

While generalizing SnapdragonCamera app for any number of cameras we
have to handle a special case if number of camera's are less than 2.
If there is only 1 camera in the app then there is no camera switch
option and hence the corresponding switch icon object is null

Change-Id: I672708bb98a30054adaf916bb272b50cdd8d0091
2 files changed