Expose peerconnection_jni publicly until we have a proper NDK.

Bug: webrtc:8662
Change-Id: I9ed6664d76d1ef65b2c907970aef64b69d7bec8b
Reviewed-on: https://webrtc-review.googlesource.com/39513
Reviewed-by: Anders Carlsson <andersc@webrtc.org>
Commit-Queue: Sami Kalliomäki <sakal@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#21627}
diff --git a/sdk/android/BUILD.gn b/sdk/android/BUILD.gn
index 8305e4d..b57f48d 100644
--- a/sdk/android/BUILD.gn
+++ b/sdk/android/BUILD.gn
@@ -347,6 +347,10 @@
 }
 
 rtc_static_library("peerconnection_jni") {
+  # Do not depend on this target externally unless you absolute have to. It is
+  # made public because we don't have a proper NDK yet. Header APIs here are not
+  # considered public and are subject to change.
+  visibility = [ "*" ]
   sources = [
     "src/jni/androidnetworkmonitor_jni.h",
     "src/jni/pc/androidnetworkmonitor.cc",