Export rtc::ReceivedPacket

To ensure the class can be used by Chrome etc.

Bug: webrtc:11943
Change-Id: I54951b5a2005f0efbe2c9fcb58e67e4fe7508b3b
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/329020
Auto-Submit: Per Kjellander <perkj@webrtc.org>
Commit-Queue: Per Kjellander <perkj@webrtc.org>
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#41268}

rtc_base/network/BUILD.gn

@@ -26,6 +26,7 @@ rtc_library("received_packet") {
     "..:socket_address",
     "../../api:array_view",
     "../../api/units:timestamp",
+    "../system:rtc_export",
   ]
   absl_deps = [
     "//third_party/abseil-cpp/absl/functional:any_invocable",

rtc_base/network/received_packet.h

@@ -16,6 +16,7 @@
 #include "api/array_view.h"
 #include "api/units/timestamp.h"
 #include "rtc_base/socket_address.h"
+#include "rtc_base/system/rtc_export.h"
 
 namespace rtc {
 
@@ -23,7 +24,7 @@ namespace rtc {
 // It contains a payload and metadata.
 // ReceivedPacket itself does not put constraints on what payload contains. For
 // example it may contains STUN, SCTP, SRTP, RTP, RTCP.... etc.
-class ReceivedPacket {
+class RTC_EXPORT ReceivedPacket {
  public:
   // Caller must keep memory pointed to by payload and address valid for the
   // lifetime of this ReceivedPacket.