Fix missing visibility for new API targets.

Bug: webrtc:8733
Change-Id: I3fb1ac9a9941f7b8ad35a51be0e7b6840a2d9141
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/266220
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Auto-Submit: Mirko Bonadei <mbonadei@webrtc.org>
Commit-Queue: Harald Alvestrand <hta@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#37265}
diff --git a/api/BUILD.gn b/api/BUILD.gn
index 9e8c48d..5f6bc49 100644
--- a/api/BUILD.gn
+++ b/api/BUILD.gn
@@ -136,6 +136,8 @@
 
 # TODO(bugs.webrtc.org/8733): Switch to rtc_library.
 rtc_library("candidate") {
+  visibility = [ "*" ]
+
   # TODO(bugs.webrtc.org/8733): Uncomment.
   # sources = [
   #   "candidate.cc",
@@ -155,11 +157,14 @@
 }
 
 rtc_source_set("turn_customizer") {
+  visibility = [ "*" ]
   # TODO(bugs.webrtc.org/8733): Uncomment.
   # sources = [ "turn_customizer.h" ]
 }
 
 rtc_source_set("ice_transport_interface") {
+  visibility = [ "*" ]
+
   # TODO(bugs.webrtc.org/8733): Uncomment.
   # sources = [ "ice_transport_interface.h" ]
   deps = [
@@ -174,6 +179,8 @@
 
 # TODO(bugs.webrtc.org/8733): Switch to rtc_library.
 rtc_source_set("dtls_transport_interface") {
+  visibility = [ "*" ]
+
   # TODO(bugs.webrtc.org/8733): Uncomment.
   # sources = [
   #   "dtls_transport_interface.cc",