Move SampleStatsCounter to public API

Bug: None
Change-Id: I8956f6febbb1caf71e951d212d57746fe1ec5eb2
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/184506
Commit-Queue: Artem Titov <titovartem@webrtc.org>
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#32142}
diff --git a/test/BUILD.gn b/test/BUILD.gn
index 549596f..9cf5422 100644
--- a/test/BUILD.gn
+++ b/test/BUILD.gn
@@ -35,8 +35,8 @@
 
 rtc_library("frame_generator_impl") {
   visibility = [
-    "../api:create_frame_generator",
     ":*",
+    "../api:create_frame_generator",
   ]
   testonly = true
   sources = [
@@ -246,6 +246,7 @@
   ]
   deps = [
     "../api:array_view",
+    "../api/numerics",
     "../rtc_base:checks",
     "../rtc_base:criticalsection",
     "../rtc_base:logging",