Stop using public_deps in modules/rtp_rtcp.

TBR=phoglund@webrtc.org

Bug: webrtc:8603
Change-Id: I86830df23db3f33a1a26098e639596bd3b86485a
No-Try: True
Reviewed-on: https://webrtc-review.googlesource.com/29780
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Edward Lemur <ehmaldonado@webrtc.org>
Reviewed-by: Patrik Höglund <phoglund@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#21108}
diff --git a/audio/BUILD.gn b/audio/BUILD.gn
index 2a29ceb..5a63a6f 100644
--- a/audio/BUILD.gn
+++ b/audio/BUILD.gn
@@ -53,7 +53,7 @@
     "../modules/congestion_controller:congestion_controller",
     "../modules/pacing:pacing",
     "../modules/remote_bitrate_estimator:remote_bitrate_estimator",
-    "../modules/rtp_rtcp:rtp_rtcp",
+    "../modules/rtp_rtcp",
     "../rtc_base:rtc_base",
     "../rtc_base:rtc_base_approved",
     "../rtc_base:rtc_task_queue",