Extend prune_palette_search_level speed feature

STATS_CHANGED

Change-Id: I04696d960c0deabfae3cc53efbda9373e0e64d5b
diff --git a/av1/encoder/speed_features.c b/av1/encoder/speed_features.c
index e47b7ff..ce86f0d 100644
--- a/av1/encoder/speed_features.c
+++ b/av1/encoder/speed_features.c
@@ -418,7 +418,7 @@
         cm->allow_screen_content_tools ? 1 : 2;
     // TODO(any): Experiment with binary search and extend for all frame types
     // and speed = 1 and 2
-    sf->prune_palette_search_level = frame_is_intra_only(&cpi->common) ? 0 : 1;
+    sf->prune_palette_search_level = 1;
   }
 
   if (speed >= 4) {
@@ -477,7 +477,6 @@
     sf->simple_motion_search_prune_agg = 2;
     sf->use_interp_filter = 2;
     sf->prune_ref_mv_idx_search = 1;
-    sf->prune_palette_search_level = 1;
   }
 
   if (speed >= 5) {