msm: vidc: Driver changes to disable demux in core decoder.

Added the following driver changes to support demux
disabling in video core.

	- IOCTLs to check if feature can be enabled.
	- set/get feature properties
	- descriptor buffer handling
	- HAL changes to enable/disable feature in
          video core
	- Resource tracker changes

Change-Id: I86cf4c959175aba954339fff9f78dae6b5be740c
Signed-off-by: Deepika Pepakayala <deepikap@codeaurora.org>