Update CallPerfTest.TestEncodeFramerateVp8Simulcast

Only verify simulcast layers with reduced framerate (FramerateController used) and not input fps for now.
Input framerate varies in some tests.

Bug: webrtc:13031
Change-Id: I19b14b9fba70da2df49c0471b67e4c3a5fea4a2e
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/230782
Commit-Queue: Åsa Persson <asapersson@webrtc.org>
Reviewed-by: Björn Terelius <terelius@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#34881}

call/call_perf_tests.cc

diff --git a/call/call_perf_tests.cc b/call/call_perf_tests.cc
index b1f17c8..8510af4 100644
--- a/call/call_perf_tests.cc
+++ b/call/call_perf_tests.cc
@@ -1124,6 +1124,10 @@
     }
 
     void VerifyStats() const {
+      double input_fps = 0.0;
+      for (const auto& configured_framerate : configured_framerates_) {
+        input_fps = std::max(configured_framerate.second, input_fps);
+      }
       for (const auto& encode_frame_rate_list : encode_frame_rate_lists_) {
         const std::vector<double>& values = encode_frame_rate_list.second;
         test::PrintResultList("substream", "", "encode_frame_rate", values,
@@ -1132,7 +1136,8 @@
             std::accumulate(values.begin(), values.end(), 0.0) / values.size();
         uint32_t ssrc = encode_frame_rate_list.first;
         double expected_fps = configured_framerates_.find(ssrc)->second;
-        EXPECT_NEAR(expected_fps, average_fps, kAllowedFpsDiff);
+        if (expected_fps != input_fps)
+          EXPECT_NEAR(expected_fps, average_fps, kAllowedFpsDiff);
       }
     }