Remove undefined skip behavior for compund modes
Remove undefined skip behavior for compund modes

1) frame_mv for compound modes is not set yet in
set_params_rd_pick_inter_mode. So the skip behavior is not
determined.

2) For single modes, use get_this_mv() to replace frame_mv

This is an on-going work for removing frame_mv data structure

STATS_CHANGED

Change-Id: I63dc5c61c2d590c9bf70a411b66b227ac1f67bad

GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom