libqmi,mbim: only enable QMI over MBIM indications if QMI-capable device
Otherwise, all service subscribe list operations including the unsupported service may fail:
[04 nov 2018, 23:02:16] [Debug] [/dev/cdc-wdm2] Received message (translated)...
>>>>>> Header:
>>>>>> length = 48
>>>>>> type = command-done (0x80000003)
>>>>>> transaction = 19
>>>>>> Fragment header:
>>>>>> total = 1
>>>>>> current = 0
>>>>>> Contents:
>>>>>> status error = 'InvalidDeviceServiceOperation' (0x00000022)
>>>>>> service = 'basic-connect' (a289cc33-bcbb-8b4f-b6b0-133ec2aae6df)
>>>>>> cid = 'device-service-subscribe-list' (0x00000013)