Delete internal getter methods from RtpRtcpInterface

Methods deleted: StorePackets, RtcpXrRrtrStatus. They are now private
methods on the two implementations.

Bug: None
Change-Id: If68e8f1e8ba233302e24e0cdb6bf7c1b0c9f330f
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/194322
Reviewed-by: Danil Chapovalov <danilchap@webrtc.org>
Commit-Queue: Niels Moller <nisse@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#32670}

modules/rtp_rtcp/source/rtp_rtcp_impl2.h

@@ -231,16 +231,12 @@ class ModuleRtpRtcpImpl2 final : public RtpRtcpInterface,
   // requests.
   void SetStorePacketsStatus(bool enable, uint16_t number_to_store) override;
 
-  bool StorePackets() const override;
-
   void SendCombinedRtcpPacket(
       std::vector<std::unique_ptr<rtcp::RtcpPacket>> rtcp_packets) override;
 
   // (XR) Receiver reference time report.
   void SetRtcpXrRrtrStatus(bool enable) override;
 
-  bool RtcpXrRrtrStatus() const override;
-
   // Video part.
   int32_t SendLossNotification(uint16_t last_decoded_seq_num,
                                uint16_t last_received_seq_num,
@@ -292,6 +288,12 @@ class ModuleRtpRtcpImpl2 final : public RtpRtcpInterface,
   // check if we need to send RTCP report, send TMMBR updates and fire events.
   void PeriodicUpdate();
 
+  // Returns true if the module is configured to store packets.
+  bool StorePackets() const;
+
+  // Returns current Receiver Reference Time Report (RTTR) status.
+  bool RtcpXrRrtrStatus() const;
+
   TaskQueueBase* const worker_queue_;
   RTC_NO_UNIQUE_ADDRESS SequenceChecker process_thread_checker_;