This change integrates the FrameEncryptorInterface and the
FrameDecryptorInterface into the public WebRTC API surface.

This change just addresses the headers and not the internal changes.

Bug: webrtc:9681
Change-Id: I1db0172fe55ba378f62e7781c2b7dcdb93d63239
Reviewed-on: https://webrtc-review.googlesource.com/96622
Commit-Queue: Benjamin Wright <benwright@webrtc.org>
Reviewed-by: Steve Anton <steveanton@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#24488}

api/BUILD.gn

diff --git a/api/BUILD.gn b/api/BUILD.gn
index 28b3535..79d5271 100644
--- a/api/BUILD.gn
+++ b/api/BUILD.gn
@@ -52,6 +52,8 @@
     "bitrate_constraints.h",
     "candidate.cc",
     "candidate.h",
+    "crypto/framedecryptorinterface.h",
+    "crypto/frameencryptorinterface.h",
     "cryptoparams.h",
     "datachannelinterface.cc",
     "datachannelinterface.h",
@@ -94,7 +96,6 @@
     "umametrics.h",
     "videosourceproxy.h",
   ]
-
   deps = [
     ":array_view",
     ":audio_options_api",