client: Show UUIDs when listing attributes

Example output after this patch:

[bluetooth]# connect 7B:3F:2C:2B:D0:06
Attempting to connect to 7B:3F:2C:2B:D0:06
[CHG] Device 7B:3F:2C:2B:D0:06 Connected: yes
Connection successful
[NEW] Primary Service
        /org/bluez/hci0/dev_7B_3F_2C_2B_D0_06/service0001
        00001801-0000-1000-8000-00805f9b34fb
        Generic Attribute Profile
[NEW] Characteristic
        /org/bluez/hci0/dev_7B_3F_2C_2B_D0_06/service0001/char0002
        00002a05-0000-1000-8000-00805f9b34fb
        Service Changed
[NEW] Primary Service
        /org/bluez/hci0/dev_7B_3F_2C_2B_D0_06/service0028
        0000180f-0000-1000-8000-00805f9b34fb
        Battery Service
[NEW] Characteristic
        /org/bluez/hci0/dev_7B_3F_2C_2B_D0_06/service0028/char0029
        00002a19-0000-1000-8000-00805f9b34fb
        Battery Level
[NEW] Descriptor
        /org/bluez/hci0/dev_7B_3F_2C_2B_D0_06/service0028/char0029/desc002b
        00002902-0000-1000-8000-00805f9b34fb
        Client Characteristic Configuration
[CHG] Device 7B:3F:2C:2B:D0:06 UUIDs: 00001800-0000-1000-8000-00805f9b34fb
[CHG] Device 7B:3F:2C:2B:D0:06 UUIDs: 00001801-0000-1000-8000-00805f9b34fb
[CHG] Device 7B:3F:2C:2B:D0:06 UUIDs: 0000180f-0000-1000-8000-00805f9b34fb
[CHG] Device 7B:3F:2C:2B:D0:06 ServicesResolved: yes
1 file changed