Add configuration of new cpu load estimator via field trials.

Field trial overrides setting via RTCConfiguration.

Bug: None
Change-Id: Id7b2aa9c533fe20f2870edd589bb169946cc4936
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/133568
Reviewed-by: Sebastian Jansson <srte@webrtc.org>
Reviewed-by: Erik Språng <sprang@webrtc.org>
Commit-Queue: Niels Moller <nisse@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#27757}
diff --git a/video/BUILD.gn b/video/BUILD.gn
index 2555339..8d776d5 100644
--- a/video/BUILD.gn
+++ b/video/BUILD.gn
@@ -205,6 +205,7 @@
     "../rtc_base:rtc_task_queue",
     "../rtc_base:timeutils",
     "../rtc_base/experiments:alr_experiment",
+    "../rtc_base/experiments:field_trial_parser",
     "../rtc_base/experiments:quality_scaling_experiment",
     "../rtc_base/experiments:rate_control_settings",
     "../rtc_base/synchronization:sequence_checker",