VideoDecoderMPEG4: Support multiple frame in decode buffer

BZ: 21585

Add mix handling for the multiple frame in decode buffer.
return next frame timestamp,offset and DECODE_MULTIPLE_FRAME
to OMX IL for handling.
Signed-off-by: xiao <fengx.xiao@intel.com>

Change-Id: Ic64e5c24cd5f72ab2a7007f8ab274af2993f8cb3
Reviewed-on: http://android.intel.com:8080/35189
Reviewed-by: Ding, Haitao <haitao.ding@intel.com>
Tested-by: Ding, Haitao <haitao.ding@intel.com>
Reviewed-by: buildbot <buildbot@intel.com>
Tested-by: buildbot <buildbot@intel.com>
6 files changed