monitor: Decode LTV fields of Basic Audio Announcements

This decodes the LTV fields of Basic Audio Announcements:

< HCI Command: LE Set Periodic Advertising Data (0x08|0x003f) plen 41
        Handle: 0
        Operation: Complete ext advertising data (0x03)
        Data length: 0x26
        Service Data: Basic Audio Announcement (0x1851)
          Presetation Delay: 40000
          Number of Subgroups: 1
            Subgroup #0:
            Number of BIS(s): 1
            Codec: LC3 (0x06)
            Codec Specific Configuration #0: len 0x02 type 0x01
            Codec Specific Configuration: 03
            Codec Specific Configuration #1: len 0x02 type 0x02
            Codec Specific Configuration: 01
            Codec Specific Configuration #2: len 0x05 type 0x03
            Codec Specific Configuration: 01000000
            Codec Specific Configuration #3: len 0x03 type 0x04
            Codec Specific Configuration: 2800
            Metadata #0: len 0x03 type 0x02
            Metadata: 0200
              BIS #0:
              Index: 1
              Codec Specific Configuration:
1 file changed