Bluetooth: L2CAP: Set BR/EDR CoC channel as connected

Finalizes CoC channel configuration setup. The channel's CONNECTED state
can be set depending on context path by two responsible for that handlers.
Then one of them announces to all registered clients the connection is
set successfully.

> ACL Data RX: Handle 12 flags 0x02 dlen 12                   [hci1] 108.666944
      L2CAP: Connection Request (0x02) ident 3 len 4
        PSM: 3 (0x0003)
        Source CID: 64
> HCI Event: Number of Completed Packets (0x13) plen 5        [hci1] 108.668572
        Num handles: 1
        Handle: 12
        Count: 2
< ACL Data TX: Handle 12 flags 0x00 dlen 16                   [hci1] 108.673002
      L2CAP: Connection Response (0x03) ident 3 len 8
        Destination CID: 64
        Source CID: 64
        Result: Connection successful (0x0000)
        Status: No further information available (0x0000)
< HCI Command: Host Number of Complet.. (0x03|0x0035) plen 5  [hci1] 108.673548
        Num handles: 1
        Handle: 12
        Count: 1
< ACL Data TX: Handle 12 flags 0x00 dlen 16                   [hci1] 108.674725
      L2CAP: Configure Request (0x04) ident 5 len 8
        Destination CID: 64
        Flags: 0x0000
        Option: Maximum Transmission Unit (0x01) [mandatory]
          MTU: 48
> HCI Event: Number of Completed Packets (0x13) plen 5        [hci1] 108.707579
        Num handles: 1
        Handle: 12
        Count: 2
> ACL Data RX: Handle 12 flags 0x02 dlen 16                   [hci1] 108.714206
      L2CAP: Configure Request (0x04) ident 4 len 8
        Destination CID: 64
        Flags: 0x0000
        Option: Maximum Transmission Unit (0x01) [mandatory]
          MTU: 560
> ACL Data RX: Handle 12 flags 0x02 dlen 18                   [hci1] 108.715442
      L2CAP: Configure Response (0x05) ident 5 len 10
        Source CID: 64
        Flags: 0x0000
        Result: Success (0x0000)
        Option: Maximum Transmission Unit (0x01) [mandatory]
          MTU: 48
< HCI Command: Host Number of Complet.. (0x03|0x0035) plen 5  [hci1] 108.720451
        Num handles: 1
        Handle: 12
        Count: 1
< ACL Data TX: Handle 12 flags 0x00 dlen 14                   [hci1] 108.720472
      L2CAP: Configure Response (0x05) ident 4 len 6
        Source CID: 64
        Flags: 0x0000
        Result: Success (0x0000)

Change-Id: If831777f7bd87489eefbd200a1ca8883b83aae3e
Signed-off-by: Arkadiusz Lichwa <arkadiusz.lichwa@tieto.com>