Reland "Don't use all_dependent_configs for sdk frameworks"

This is a reland of 63741c7fa1aa55a38af11ac8cc04498722f9407d

It's possible to reland after the downstream fix in
https://chromium-review.googlesource.com/1730415

Original change's description:
> Don't use all_dependent_configs for sdk frameworks
>
> libs should be propagated to the final binary even without that:
> https://gn.googlesource.com/gn/+/master/docs/reference.md#var_libs
>
> But add some missing SDK framework dependencies:
>
> * RTCNativeI420Buffer.mm uses CGBitmapContextGetBytesPerRow.
> * socketrocket uses SecCertificateCopyData.
>
> Bug: None
> Change-Id: Iba38a5dfaf470a5a790d494cbec8ade44b1d16ba
> Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/146082
> Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
> Commit-Queue: Oleh Prypin <oprypin@webrtc.org>
> Cr-Commit-Position: refs/heads/master@{#28605}

Bug: None
Change-Id: I6a1cd80c5177ef3a3b92ee55fc91e187b202d864
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/147720
Commit-Queue: Oleh Prypin <oprypin@webrtc.org>
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#28740}
diff --git a/examples/BUILD.gn b/examples/BUILD.gn
index a09d6a2..ce60643 100644
--- a/examples/BUILD.gn
+++ b/examples/BUILD.gn
@@ -588,6 +588,7 @@
 
     libs = [
       "CFNetwork.framework",
+      "Security.framework",
       "icucore",
     ]
   }