Moved vp8dx_get_raw_frame() call to vp8_get_frame()

This change is necessary for the frame-based multithreading
implementation.
Since the postproc occurs in this call, vpxdec was modified to time around
vpx_codec_get_frame()

Change-Id: I389acf78b6003cd35e41becc16c893f7d3028523
2 files changed