msm: vidc: Add header file for sharing media info

Create a common header file which can be used across
mulitmedia subsystems for sharing static information
between them. One such requirement is to share information
related to video color formats. This common header file
avoids duplication of same calculations across different
drivers and userspace.

Change-Id: I4cb70c6b2461cc4dfcabcf147f0f314c5cf6a8bd
Signed-off-by: Vinay Kalia <vkalia@codeaurora.org>