Remove the public_deps to fileutils from test_support.

Bug: webrtc:8946
Change-Id: Ia01d8bb1b42485e29f26792b9266228743d7fd90
No-Presubmit: true
Reviewed-on: https://webrtc-review.googlesource.com/62100
Commit-Queue: Artem Titov <titovartem@webrtc.org>
Reviewed-by: Artem Titov <titovartem@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#22465}
diff --git a/modules/audio_device/BUILD.gn b/modules/audio_device/BUILD.gn
index 84d70ec..81b7454 100644
--- a/modules/audio_device/BUILD.gn
+++ b/modules/audio_device/BUILD.gn
@@ -400,6 +400,7 @@
         "../../rtc_base:rtc_base_approved",
         "../../sdk:audio_objc",
         "../../system_wrappers",
+        "../../test:fileutils",
         "../../test:test_support",
         "//third_party/ocmock",
       ]
@@ -428,6 +429,7 @@
       "../../rtc_base:checks",
       "../../rtc_base:rtc_base_approved",
       "../../system_wrappers",
+      "../../test:fileutils",
       "../../test:test_support",
       "../utility:utility",
     ]