Reland Use runtime enabled features API to enable dual stream mode

This is an unchanged patch after dependency fixes in downstream projects are implemented.

Original patch was reviewed here:
https://webrtc-review.googlesource.com/c/src/+/39008

TBR=phoglund@webrtc.org,ilnik@webrtc.org,nisse@webrtc.org,philipel@webrtc.org,lliuu@webrtc.org

Change-Id: I648bbf63d34282a48cabc854615005ec65b28cb3
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: webrtc:8287
Reviewed-on: https://webrtc-review.googlesource.com/40420
Commit-Queue: Ilya Nikolaevskiy <ilnik@webrtc.org>
Reviewed-by: Ilya Nikolaevskiy <ilnik@webrtc.org>
Reviewed-by: Niels Moller <nisse@webrtc.org>
Reviewed-by: Patrik Höglund <phoglund@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#21674}
diff --git a/sdk/BUILD.gn b/sdk/BUILD.gn
index 121e47c..b587a55 100644
--- a/sdk/BUILD.gn
+++ b/sdk/BUILD.gn
@@ -751,6 +751,7 @@
           "../rtc_base:rtc_base_approved",
           "../system_wrappers:field_trial_default",
           "../system_wrappers:metrics_default",
+          "../system_wrappers:runtime_enabled_features_default",
         ]
 
         libs = [
@@ -779,6 +780,7 @@
         ":ui_objc",
         "../system_wrappers:field_trial_default",
         "../system_wrappers:metrics_default",
+        "../system_wrappers:runtime_enabled_features_default",
       ]
     }