Update screen simulcast config and fix periodic encoder param update

webrtc/test/fake_encoder.cc

Index: webrtc/test/fake_encoder.cc
diff --git a/webrtc/test/fake_encoder.cc b/webrtc/test/fake_encoder.cc
index 1db93eb40e36b6ebc87089a6171b438bfdfa907c..f0bff12aa49d8427cd82eb0e6fb3459e2ffe44ca 100644
--- a/webrtc/test/fake_encoder.cc
+++ b/webrtc/test/fake_encoder.cc
@@ -27,6 +27,7 @@ namespace test {
 FakeEncoder::FakeEncoder(Clock* clock)
     : clock_(clock),
       callback_(nullptr),
+      configured_input_framerate_(-1),
       max_target_bitrate_kbps_(-1),
       last_encode_time_ms_(0) {
   // Generate some arbitrary not-all-zero data
@@ -47,6 +48,7 @@ int32_t FakeEncoder::InitEncode(const VideoCodec* config,
   rtc::CritScope cs(&crit_sect_);
   config_ = *config;
   target_bitrate_.SetBitrate(0, 0, config_.startBitrate * 1000);
+  configured_input_framerate_ = config_.maxFramerate;
   return 0;
 }
 
@@ -170,6 +172,7 @@ int32_t FakeEncoder::SetRateAllocation(const BitrateAllocation& rate_allocation,
                                        uint32_t framerate) {
   rtc::CritScope cs(&crit_sect_);
   target_bitrate_ = rate_allocation;
+  configured_input_framerate_ = framerate;
   return 0;
 }
 
@@ -178,6 +181,11 @@ const char* FakeEncoder::ImplementationName() const {
   return kImplementationName;
 }
 
+int FakeEncoder::GetConfiguredInputFramerate() {
+  rtc::CritScope cs(&crit_sect_);
+  return configured_input_framerate_;
+}
+
 FakeH264Encoder::FakeH264Encoder(Clock* clock)
     : FakeEncoder(clock), callback_(nullptr), idr_counter_(0) {
   FakeEncoder::RegisterEncodeCompleteCallback(this);