Don't redefine B_PACK_CHARS

#include <utils/Vector.h>

// linux/binder.h already defines this, but we can't just include it from there

// because there are host builds that include this file.

#ifndef B_PACK_CHARS

#define B_PACK_CHARS(c1, c2, c3, c4) \

    ((((c1)<<24)) | (((c2)<<16)) | (((c3)<<8)) | (c4))

#endif  // B_PACK_CHARS

// ---------------------------------------------------------------------------

namespace android {