DataBarExpanded: enable support to read symbols containing arbitrary text
DataBarExpanded: enable support to read symbols containing arbitrary text

Before, the code could only decode GS1 Application Identifier (AI)
encoded strings. This change may significantly increase the rist of
falsepositives/misreads.

nu-book/zxing-cpp,huycn/zxing-cpp,huycn/zxing-cpp,nu-book/zxing-cpp,nu-book/zxing-cpp,huycn/zxing-cpp,nu-book/zxing-cpp,nu-book/zxing-cpp,nu-book/zxing-cpp,nu-book/zxing-cpp,huycn/zxing-cpp,nu-book/zxing-cpp,huycn/zxing-cpp,huycn/zxing-cpp,huycn/zxing-cpp,huycn/zxing-cpp