Host_assistance calibration support

[doronhi]

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Added support for host-assisted on-chip-calibration and tare-calibration. The flaw is to call the same functions, run_on_chip_calibration() and run_tare_calibration(), as before. An empty result vector implies the need to provide the calibration process with a depth frame using the newly added function: add_calibration_frame(). The process is done when add_calibration_frame() returns a calibration vector.

Workflow is demonstrated in wrappers\python\examples\depth_auto_calibration_example.py

[Nir-Az]

@ev-mp Is this still relevant?