monitor/avdtp: Decode AVDTP_DISCOVER

monitor/avdtp: Decode AVDTP_DISCOVER

< ACL Data TX: Handle 256 flags 0x00 dlen 6
      Channel: 258 len 2 [PSM 25 mode 0] {chan 2}
      AVDTP: Discover (0x01) Command (0x00) type 0x00 label 0 nosp 0
> ACL Data RX: Handle 256 flags 0x02 dlen 14
      Channel: 66 len 10 [PSM 25 mode 0] {chan 2}
      AVDTP: Discover (0x01) Response Accept (0x02) type 0x00 label 0 nosp 0
        ACP SEID: 1
          Media Type: Audio (0x00)
          SEP Type: SRC (0x01)
          In use: No
        ACP SEID: 5
          Media Type: Audio (0x00)
          SEP Type: SRC (0x01)
          In use: No
        ACP SEID: 3
          Media Type: Audio (0x00)
          SEP Type: SRC (0x01)
          In use: No
        ACP SEID: 2
          Media Type: Audio (0x00)
          SEP Type: SRC (0x01)
          In use: No