monitor/att: Add decoding support for BASS

monitor/att: Add decoding support for BASS

This adds decoding support for BASS attributes:

> ACL Data RX: Handle 0 flags 0x02 dlen 7
      ATT: Read Request (0x0a) len 2
        Handle: 0x003a Type: Broadcast Receive State (0x2bc8)

< ACL Data TX: Handle 0 flags 0x00 dlen 45
      ATT: Read Response (0x0b) len 40
        Handle: 0x003a Type: Broadcast Receive State (0x2bc8)
        Value: 0100f2698be807c0013a6501020101000000000403020400
          Source_ID: 1
          Source_Address_Type: 0
          Source_Address: C0:07:E8:8B:69:F2
          Source_Adv_SID: 1
          Broadcast_ID: 0x01653a
          PA_Sync_State: Synchronized to PA
          BIG_Encryption: Broadcast_Code required
          Num_Subgroups: 1
          Subgroup #0:
            BIS_Sync State: 0x00000000
            Metadata #0: len 0x03 type 0x02
            Metadata: 0400

> ACL Data RX: Handle 0 flags 0x02 dlen 7
      ATT: Read Request (0x0a) len 2
        Handle: 0x003d Type: Broadcast Receive State (0x2bc8)

< ACL Data TX: Handle 0 flags 0x00 dlen 5
      ATT: Read Response (0x0b) len 0
        Handle: 0x003d Type: Broadcast Receive State (0x2bc8)
        Value:
          Empty characteristic

> ACL Data RX: Handle 0 flags 0x02 dlen 8
      ATT: Write Request (0x12) len 3
        Handle: 0x0040 Type: Broadcast Audio Scan Control Point (0x2bc7)
          Data: 00
            Opcode: Remote Scan Stopped (0x00)

< ACL Data TX: Handle 0 flags 0x00 dlen 9
      ATT: Error Response (0x01) len 4
        Write Request (0x12)
        Handle: 0x0040
        Error: Reserved (0x80)

> ACL Data RX: Handle 0 flags 0x02 dlen 8
      ATT: Write Request (0x12) len 3
        Handle: 0x0040 Type: Broadcast Audio Scan Control Point (0x2bc7)
          Data: 01
            Opcode: Remote Scan Started (0x01)

< ACL Data TX: Handle 0 flags 0x00 dlen 9
      ATT: Error Response (0x01) len 4
        Write Request (0x12)
        Handle: 0x0040
        Error: Reserved (0x80)

> ACL Data RX: Handle 0 flags 0x01 dlen 5
      ATT: Write Request (0x12) len 27
        Handle: 0x0040 Type: Broadcast Audio Scan Control Point (0x2bc7)
          Data: 0200f2698be807c0013a650100ffff01000000000403020400
            Opcode: Add Source (0x02)
            Source_Address_Type: 0
            Source_Address: C0:07:E8:8B:69:F2
            Source_Adv_SID: 1
            Broadcast_ID: 0x01653a
            PA_Sync_State: Do not synchronize to PA
            PA_Interval: 0xffff
            Num_Subgroups: 1
            Subgroup #0:
              BIS_Sync State: 0x00000000
              Metadata #0: len 0x03 type 0x02
              Metadata: 0400

< ACL Data TX: Handle 0 flags 0x00 dlen 9
      ATT: Error Response (0x01) len 4
        Write Request (0x12)
        Handle: 0x0040
        Error: Reserved (0x80)

> ACL Data RX: Handle 0 flags 0x02 dlen 22
      ATT: Write Request (0x12) len 17
        Handle: 0x0040 Type: Broadcast Audio Scan Control Point (0x2bc7)
          Data: 030102780001000000000403040400
            Opcode: Modify Source (0x03)
            Source_ID: 1
            PA_Sync_State: Synchronize to PA - PAST not available
            PA_Interval: 0x0078
            Num_Subgroups: 1
            Subgroup #0:
              BIS_Sync State: 0x00000000
              Metadata #0: len 0x03 type 0x04
              Metadata: 0400

< ACL Data TX: Handle 0 flags 0x00 dlen 9
      ATT: Error Response (0x01) len 4
        Write Request (0x12)
        Handle: 0x0040
        Error: Reserved (0x80)

> ACL Data RX: Handle 0 flags 0x02 dlen 25
      ATT: Write Request (0x12) len 20
        Handle: 0x0040 Type: Broadcast Audio Scan Control Point (0x2bc7)
          Data: 0401b803eac6afbb65a25a41f15305680201
            Opcode: Set Broadcast_Code (0x04)
            Source_ID: 1
            Broadcast_Code: b803eac6afbb65a25a41f15305680201

< ACL Data TX: Handle 0 flags 0x00 dlen 5
      ATT: Write Response (0x13) len 0

< ACL Data TX: Handle 0 flags 0x00 dlen 33
      ATT: Handle Multiple Value Notification (0x23) len 28
        Length: 0x0018
        Handle: 0x003a Type: Broadcast Receive State (0x2bc8)
          Data: 0100f2698be807c0013a6501020201000000000403020400
          Source_ID: 1
          Source_Address_Type: 0
          Source_Address: C0:07:E8:8B:69:F2
          Source_Adv_SID: 1
          Broadcast_ID: 0x01653a
          PA_Sync_State: Synchronized to PA
          BIG_Encryption: Decrypting
          Num_Subgroups: 1
          Subgroup #0:
            BIS_Sync State: 0x00000000
            Metadata #0: len 0x03 type 0x02
            Metadata: 0400

> ACL Data RX: Handle 0 flags 0x02 dlen 9
      ATT: Write Request (0x12) len 4
        Handle: 0x0040 Type: Broadcast Audio Scan Control Point (0x2bc7)
          Data: 0501
            Opcode: Remove Source (0x05)
            Source_ID: 1

< ACL Data TX: Handle 0 flags 0x00 dlen 9
      ATT: Error Response (0x01) len 4
        Write Request (0x12)
        Handle: 0x0040
        Error: Reserved (0x80)