Move random out of rtc_base_approved

Bug: webrtc:9838
Change-Id: I64a5ef18c19d446139354d04aa6cb2a76d18aad0
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/258762
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Commit-Queue: Florent Castelli <orphis@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#36572}

api/BUILD.gn

@@ -672,6 +672,7 @@ rtc_source_set("simulated_network_api") {
   deps = [
     "../rtc_base",
     "../rtc_base:macromagic",
+    "../rtc_base:random",
   ]
   absl_deps = [ "//third_party/abseil-cpp/absl/types:optional" ]
 }