Adds field trial to AudioPriorityBitrateAllocationStrategy.

Bug: webrtc:9718
Change-Id: I6419616c27c581e47fdb78ad6594496fad5cec76
Reviewed-on: https://webrtc-review.googlesource.com/c/106261
Commit-Queue: Sebastian Jansson <srte@webrtc.org>
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#25252}
diff --git a/rtc_base/BUILD.gn b/rtc_base/BUILD.gn
index a4c2205..300b872 100644
--- a/rtc_base/BUILD.gn
+++ b/rtc_base/BUILD.gn
@@ -76,9 +76,12 @@
     ":checks",
     ":rtc_task_queue",
     ":safe_compare",
+    ":safe_minmax",
     ":type_traits",
     "..:webrtc_common",
     "../api:array_view",
+    "../system_wrappers:field_trial",
+    "experiments:field_trial_parser",
     "system:arch",
     "system:unused",
     "third_party/base64",