mv_machine_learning: introduce engine configuration task API

mv_machine_learning: introduce engine configuration task API

[Issue type] : new feature

Introduced inference engine configuration task API, which allows user to
set user desired inference engine and its device type for inference
request. Regarding this, this patch adds below itask interfaces,
	- setEngineInfo
	  . Set user desired inference engine and its device type.
	- getNumberOfEngine
	  . Get how many inference engines are available for a given task API.
	- getEngineType
	  . Get inference engine type to a given index.
	- getNumberOfDevice
	  . Get how many device types are available for a given inference engine.
	- getDeviceType
	  . Get device type with a given index.

And as an actual task API implementation, this patch introduces
inference engine configuration API for image classification task group.

Change-Id: I8c8a161ea83e851d120bc04290323f2f15103da8
Signed-off-by: Inki Dae <inki.dae@samsung.com>