sdm: Optimize set_target_op_mode behavior

PC tool aggressively used set_target_op_mode<enter/exit> on
every cycle of switching between its Calibration and Tuning
Tab for now.

Acquire necessary resources at first invoking of
set_target_op_mode<> to avoid frequenctly acquiring/releasing
of the underlying resources.

Move inline API implementation from color_params.h to
color_manager.cpp module.

CRs-Fixed: 879547

Change-Id: Ieb61a5126e862f73f504e34f9aa2672a8df57f83
3 files changed