Migrate to AnyInvocable in webrtc medium

PiperOrigin-RevId: 565805742

connections/implementation/mediums/webrtc/BUILD

@@ -42,6 +42,7 @@ cc_library(
         "//internal/platform:types",
         "//proto/mediums:web_rtc_signaling_frames_cc_proto",
         # TODO: Support WebRTC
+        "@com_google_absl//absl/functional:any_invocable",
         "@com_google_absl//absl/memory",
         "@com_google_absl//absl/time",
     ],

connections/implementation/mediums/webrtc/data_channel_listener.h

@@ -17,9 +17,8 @@
 
 #ifndef NO_WEBRTC
 
+#include "absl/functional/any_invocable.h"
 #include "connections/implementation/mediums/webrtc_socket.h"
-#include "connections/listeners.h"
-#include "internal/platform/byte_array.h"
 
 namespace nearby {
 namespace connections {
@@ -29,11 +28,11 @@ namespace mediums {
 struct DataChannelListener {
   // Called when the data channel is open and the socket wraper is ready to
   // read and write.
-  std::function<void(WebRtcSocketWrapper)> data_channel_open_cb =
+  absl::AnyInvocable<void(WebRtcSocketWrapper)> data_channel_open_cb =
       [](WebRtcSocketWrapper) {};
 
   // Called when the data channel is closed.
-  std::function<void()> data_channel_closed_cb = []() {};
+  absl::AnyInvocable<void()> data_channel_closed_cb = []() {};
 };
 
 }  // namespace mediums