vidc: Use ION for decoder
mm-video: Add the ability to use PMEM while using TARGET_USES_ION := true
media: fix compile
Conflicts:

	mm-video/vidc/vdec/inc/omx_vdec.h

Change-Id: I6be2489c38b7899726ed37bd7b08d9a1c0fd22b6

Conflicts:
	mm-video/vidc/vdec/inc/omx_vdec.h