Support bilinear filter in VP9

Cherry pick vp9/decoder/vp9_decodframe.c from
Ia3bbf57318e0cc61a1b724fe751e3f9c7e11b337 from upstream libvpx

Bug: 11051984
Change-Id: I4cd4201f733463995208a3585462b7efc999b840
diff --git a/libvpx/vp9/decoder/vp9_decodframe.c b/libvpx/vp9/decoder/vp9_decodframe.c
index 34ed0c7..dbba28e 100644
--- a/libvpx/vp9/decoder/vp9_decodframe.c
+++ b/libvpx/vp9/decoder/vp9_decodframe.c
@@ -492,7 +492,8 @@
     struct vp9_read_bit_buffer *rb) {
   const INTERPOLATIONFILTERTYPE literal_to_type[] = { EIGHTTAP_SMOOTH,
                                                       EIGHTTAP,
-                                                      EIGHTTAP_SHARP };
+                                                      EIGHTTAP_SHARP,
+                                                      BILINEAR };
   return vp9_rb_read_bit(rb) ? SWITCHABLE
                              : literal_to_type[vp9_rb_read_literal(rb, 2)];
 }