message: Use accumulate to calculate recv_delta_size
  It's a modern way to sum element of an a array.
  Cr-Commit-Position: refs/heads/main@{#35139}
diff: #include <algorithm>
  #include <cstdint>
  +#include <numeric>
  #include <utility>
  +#include "absl/algorithm/container.h"
  #include "modules/include/module_common_types_public.h"
  #include "modules/rtp_rtcp/source/byte_io.h"
  #include "modules/rtp_rtcp/source/rtcp_packet/common_header.h"
  @@ -447,10 +449,7 @@ bool TransportFeedback::Parse(const CommonHeader& packet) {
  num_seq_no_ = status_count;
  uint16_t seq_no = base_seq_no_;
  - size_t recv_delta_size = 0;
  - for (size_t delta_size : delta_sizes) {
  - recv_delta_size += delta_size;
  - }
  + size_t recv_delta_size = absl::c_accumulate(delta_sizes, 0);
  // Determine if timestamps, that is, recv_delta are included in the packet.
  if (end_index >= index + recv_delta_size) {
  