Disable sf 'full_pixel_search_level' for speed 3

Encoder performance results averaged over all resolutions are as
follows:

      Instruction Count           BD-Rate Loss(%)
cpu     Reduction(%)      avg.psnr    ssim      vmaf    vmaf_neg
 3        -1.13           -0.4226   -0.5482   -0.5450   -0.5359

STATS_CHANGED for speed = 3

Change-Id: I85a4257ca8837a3535cd280a2dd5a70a78624709

av1/encoder/speed_features.c

diff --git a/av1/encoder/speed_features.c b/av1/encoder/speed_features.c
index dfdb5e9..cf08657 100644
--- a/av1/encoder/speed_features.c
+++ b/av1/encoder/speed_features.c
@@ -1268,7 +1268,6 @@
     sf->part_sf.prune_ext_part_using_split_info = 1;
     sf->part_sf.simple_motion_search_rect_split = 1;
 
-    sf->mv_sf.full_pixel_search_level = 1;
     sf->mv_sf.subpel_search_method = SUBPEL_TREE_PRUNED;
     sf->mv_sf.search_method = DIAMOND;
     sf->mv_sf.disable_second_mv = 2;
@@ -1332,6 +1331,7 @@
 
   if (speed >= 4) {
     sf->mv_sf.subpel_search_method = SUBPEL_TREE_PRUNED_MORE;
+    sf->mv_sf.full_pixel_search_level = 1;
 
     sf->gm_sf.prune_zero_mv_with_sse = 2;
     sf->gm_sf.downsample_level = 1;