Create version 01 of Generic Frame Descriptor - with discardability flag

The discardability flag denotes whether the frame may be dropped by
the decoder with no effect on the decodability of subsequent frames.

Bug: webrtc:10214
Change-Id: I3654951d8863b50effe9670b8d1d7eb051240039
Reviewed-on: https://webrtc-review.googlesource.com/c/122241
Reviewed-by: Danil Chapovalov <danilchap@webrtc.org>
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Reviewed-by: Erik Språng <sprang@webrtc.org>
Commit-Queue: Elad Alon <eladalon@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#26763}
diff --git a/api/rtp_parameters.h b/api/rtp_parameters.h
index 6138c37..1cf4f36 100644
--- a/api/rtp_parameters.h
+++ b/api/rtp_parameters.h
@@ -297,6 +297,9 @@
   RTC_DEPRECATED static const int kFrameMarkingDefaultId;
 
   // Experimental codec agnostic frame descriptor.
+  static const char kGenericFrameDescriptorUri00[];
+  static const char kGenericFrameDescriptorUri01[];
+  // TODO(bugs.webrtc.org/10243): Remove once dependencies have been updated.
   static const char kGenericFrameDescriptorUri[];
   // TODO(bugs.webrtc.org/10288): Remove once dependencies have been updated.
   RTC_DEPRECATED static const int kGenericFrameDescriptorDefaultId;