Use Abseil container algorithms in modules/rtp_rtcp/

Bug: None
Change-Id: Ica2e9795ec6195e044403f5ee25e476f6c47cf93
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/129600
Reviewed-by: Danil Chapovalov <danilchap@webrtc.org>
Commit-Queue: Steve Anton <steveanton@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#27361}

modules/rtp_rtcp/source/rtp_format_unittest.cc

@@ -13,6 +13,7 @@
 #include <memory>
 #include <numeric>
 
+#include "absl/algorithm/container.h"
 #include "test/gmock.h"
 #include "test/gtest.h"
 
@@ -36,13 +37,13 @@ int EffectivePacketsSizeDifference(
   // Account for larger last packet header.
   sizes.back() += limits.last_packet_reduction_len;
 
-  auto minmax = std::minmax_element(sizes.begin(), sizes.end());
+  auto minmax = absl::c_minmax_element(sizes);
   // MAX-MIN
   return *minmax.second - *minmax.first;
 }
 
 int Sum(const std::vector<int>& sizes) {
-  return std::accumulate(sizes.begin(), sizes.end(), 0);
+  return absl::c_accumulate(sizes, 0);
 }
 
 TEST(RtpPacketizerSplitAboutEqually, AllPacketsAreEqualSumToPayloadLen) {