Select effective reference frame for motion field projection
Select effective reference frame for motion field projection

Use the valid reference frames' motion information to perform
motion field projection.

Change-Id: I942d62043c7a7bec820e4d13c1fdab8e04719735

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