Fix build errors of RTCAudioDeviceTests

This happend because sdk_unittests is not built on arm/arm64 iOS build.

Bug: webrtc:11022
Change-Id: I8f9adfd48e11c8512c27992804cc9b69dff15ded
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/156100
Commit-Queue: Anders Carlsson <andersc@webrtc.org>
Reviewed-by: Anders Carlsson <andersc@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#29407}
diff --git a/sdk/BUILD.gn b/sdk/BUILD.gn
index fa29b8f..2c8a114 100644
--- a/sdk/BUILD.gn
+++ b/sdk/BUILD.gn
@@ -1090,6 +1090,7 @@
             ":videosource_objc",
             ":videotoolbox_objc",
             "../api:scoped_refptr",
+            "../api/task_queue:default_task_queue_factory",
             "../api/video:video_frame_i420",
             "../common_video",
             "../media:rtc_media_base",