Default enable WebRTC-Bwe-LimitProbesLowerThanThroughputEstimate

This ensure probe results can not be lower than 85%  percentage of the
acked bitrate.

Bug: webrtc:11498
Change-Id: I501eeb84f7a049140c45c89e7de7e8080c13f94d
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/324040
Commit-Queue: Per Kjellander <perkj@webrtc.org>
Reviewed-by: Björn Terelius <terelius@webrtc.org>
Auto-Submit: Per Kjellander <perkj@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#40957}

modules/congestion_controller/goog_cc/goog_cc_network_control.cc

diff --git a/modules/congestion_controller/goog_cc/goog_cc_network_control.cc b/modules/congestion_controller/goog_cc/goog_cc_network_control.cc
index 381345f..1344bf3 100644
--- a/modules/congestion_controller/goog_cc/goog_cc_network_control.cc
+++ b/modules/congestion_controller/goog_cc/goog_cc_network_control.cc
@@ -108,8 +108,8 @@
           key_value_config_,
           "WebRTC-Bwe-IgnoreProbesLowerThanNetworkStateEstimate")),
       limit_probes_lower_than_throughput_estimate_(
-          IsEnabled(key_value_config_,
-                    "WebRTC-Bwe-LimitProbesLowerThanThroughputEstimate")),
+          IsNotDisabled(key_value_config_,
+                        "WebRTC-Bwe-LimitProbesLowerThanThroughputEstimate")),
       rate_control_settings_(
           RateControlSettings::ParseFromKeyValueConfig(key_value_config_)),
       pace_at_max_of_bwe_and_lower_link_capacity_(