Refactor: pass != 1 to !is_stat_generation_stage

Replace the check pass != 1  used  for temporal filtering
of keyframes with !is_stat_generation_stage

Change-Id: I73308fb243b3b3b6e5e51d18fd6fb09745923eac

av1/encoder/encode_strategy.c

diff --git a/av1/encoder/encode_strategy.c b/av1/encoder/encode_strategy.c
index 9aec7bd..808bb9b 100644
--- a/av1/encoder/encode_strategy.c
+++ b/av1/encoder/encode_strategy.c
@@ -932,7 +932,7 @@
                                  frame_input->source->y_stride, EDGE_THRESHOLD);
   }
   const int apply_filtering =
-      oxcf->pass != 1 && frame_params->frame_type == KEY_FRAME &&
+      !is_stat_generation_stage(cpi) && frame_params->frame_type == KEY_FRAME &&
       !frame_params->show_existing_frame &&
       cpi->rc.frames_to_key > NUM_KEY_FRAME_DENOISING && noise_level > 0 &&
       !is_lossless_requested(oxcf) && oxcf->arnr_max_frames > 0;