Only parse ATT_READ_BY_TYPE_RSP for the charactertistic type

We parse ATT_READ_BY_TYPE_RSP packet to know the ASE control point UUID,
so ignore the other packet and avoid the tool crash as the packer length
shorted than expected

Bug: 232731251
Test: ./dump_le_audio.py BTSNOOP.cfa -v --header
Change-Id: I314e8b7ff0e205a42f1f125c48b96a966191bed7