Make RtpGenericFrameDescriptor available for E2EE.

This CL makes the RtpGenericFrameDescriptor available in
RTPSenderVideo::SendVideo for encryption and in
RtpVideoStreamReceiver::OnReceivedFrame for decryption.

Bug: webrtc:9361
Change-Id: I5b6d10138c0874657862f103c8c9a2328e6d4a66
Reviewed-on: https://webrtc-review.googlesource.com/102720
Commit-Queue: Philip Eliasson <philipel@webrtc.org>
Reviewed-by: Erik Språng <sprang@webrtc.org>
Reviewed-by: Danil Chapovalov <danilchap@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#24929}
diff --git a/modules/video_coding/frame_object.h b/modules/video_coding/frame_object.h
index 5fb5193..968489b 100644
--- a/modules/video_coding/frame_object.h
+++ b/modules/video_coding/frame_object.h
@@ -15,6 +15,7 @@
 #include "api/video/encoded_frame.h"
 #include "common_types.h"  // NOLINT(build/include)
 #include "modules/include/module_common_types.h"
+#include "modules/rtp_rtcp/source/rtp_generic_frame_descriptor.h"
 
 namespace webrtc {
 namespace video_coding {
@@ -41,6 +42,7 @@
   int64_t RenderTime() const override;
   bool delayed_by_retransmission() const override;
   absl::optional<RTPVideoHeader> GetRtpVideoHeader() const;
+  absl::optional<RtpGenericFrameDescriptor> GetGenericFrameDescriptor() const;
   absl::optional<FrameMarking> GetFrameMarking() const;
 
  private: