Add CIR data struture

This is the mapping of OpenMAX IL OMX_VIDEO_PARAM_INTRAREFRESHTYPE:nCirMBs

nCirMBsis: the number of consecutive macroblocks to be coded as intra when cyclic intra-refresh (CIR) is enabled.

Signed-off-by: Austin Yuan <shengquan.yuan@intel.com>
Add the comments for intra refresh buffer type and AIR data structure

Signed-off-by: Austin Yuan <shengquan.yuan@intel.com>
Add input color_space to JPEG decoder to indicate a color space conversion may be required, based on the output surface format.
Rename CRF to ICQ and clarify VAConfigAttribEncSkipFrame is a boolean.