Update visibility for dav1d_decoder.

Bug: webrtc:13573
Change-Id: Icb43b11cf0a6ad2b90f6876875bcb545be01ec0c
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/268303
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Commit-Queue: Philip Eliasson <philipel@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#37505}

modules/video_coding/codecs/av1/BUILD.gn

@@ -28,6 +28,7 @@ rtc_library("av1_svc_config") {
 }
 
 rtc_library("dav1d_decoder") {
+  visibility = [ "*" ]
   poisonous = [ "software_video_codecs" ]
   public = [ "dav1d_decoder.h" ]
   sources = [ "dav1d_decoder.cc" ]