Moved ALR experiment settings to new experiments folder.

This replaces most of the existing dependencies on the application
limited region(ALR) detector. This is to achieve a greater separation of
concerns and will make further refactoring regarding the ALR Detector
less invasive on other parts of the code base.

Bug: webrtc:8415
Change-Id: I92912254c6d02285cce6a88f6789f0ac94794c88
Reviewed-on: https://webrtc-review.googlesource.com/37560
Commit-Queue: Sebastian Jansson <srte@webrtc.org>
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Reviewed-by: Philip Eliasson <philipel@webrtc.org>
Reviewed-by: Erik Språng <sprang@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#21598}
diff --git a/video/BUILD.gn b/video/BUILD.gn
index 6901279..8ea959b 100644
--- a/video/BUILD.gn
+++ b/video/BUILD.gn
@@ -69,6 +69,7 @@
     "../modules/rtp_rtcp:rtp_rtcp_format",
     "../modules/video_coding:video_codec_interface",
     "../rtc_base:checks",
+    "../rtc_base/experiments:alr_experiment",
     "../system_wrappers:field_trial_api",
     "../system_wrappers:metrics_api",
 
@@ -143,6 +144,7 @@
     deps = [
       ":video_quality_test",
       "../modules/pacing:pacing",
+      "../rtc_base/experiments:alr_experiment",
       "../test:field_trial",
       "../test:test_common",
       "../test:test_support",
@@ -322,6 +324,7 @@
       "../rtc_base:rtc_base_approved",
       "../rtc_base:rtc_base_tests_utils",
       "../rtc_base:rtc_numerics",
+      "../rtc_base/experiments:alr_experiment",
       "../system_wrappers",
       "../system_wrappers:field_trial_default",
       "../system_wrappers:metrics_api",