MT#55283 retain codec tracker status for answers

In case of repeated answers without additional offer in between, we
shouldn't reset the codec tracker status at the end of the codec answer
routine, so that we end up with the same state during the next answer.

Change-Id: I54f6136cc5684473553b4862c13ea9f4a3dcfe99
(cherry picked from commit d0c59a3badf1b52756685be2e8fe2d9dbea9564f)

daemon/codec.c

@@ -4629,6 +4629,13 @@ static struct codec_tracker *codec_tracker_init(void) {
 	return NULL;
 #endif
 }
+static void codec_tracker_move(struct codec_tracker **dst, struct codec_tracker **src) {
+#ifdef WITH_TRANSCODING
+	codec_tracker_destroy(dst);
+	*dst = *src;
+	*src = NULL;
+#endif
+}
 static void codec_touched_real(struct codec_store *cs, struct rtp_payload_type *pt) {
 #ifdef WITH_TRANSCODING
 	if (pt->codec_def && pt->codec_def->supplemental)
@@ -5526,6 +5533,7 @@ void codec_store_answer(struct codec_store *dst, struct codec_store *src, struct
 	}
 
 out:
+	codec_tracker_move(&dst->tracker, &orig_dst.tracker);
 	codec_store_cleanup(&orig_dst);
 }