Extend txfm_rd_gate_level speed feature to speed 3

The speed feature txfm_rd_gate_level is extended to speed preset 3.

            Encode Time
cpu-used     Reduction      Quality Loss
   3           1.356%         0.0274%

STATS_CHANGED

Change-Id: Ic85bc4ea4d35c83c17e45db319865245cf2ee133
diff --git a/av1/encoder/speed_features.c b/av1/encoder/speed_features.c
index 143f56c..2ca6f17 100644
--- a/av1/encoder/speed_features.c
+++ b/av1/encoder/speed_features.c
@@ -456,6 +456,8 @@
     if (cpi->oxcf.enable_smooth_interintra)
       sf->inter_sf.disable_smooth_interintra = boosted ? 0 : 1;
     sf->inter_sf.reuse_compound_type_decision = 1;
+    sf->inter_sf.txfm_rd_gate_level =
+        (is_boosted_arf2_bwd_type || cm->allow_screen_content_tools) ? 0 : 1;
 
     sf->intra_sf.prune_palette_search_level = 2;