Remove dependency of audio_device on metrics_default.
Remove dependency of audio_device on metrics_default.

BUG=webrtc:6349
NOTRY=True

Review-Url: https://codereview.webrtc.org/2338813002
Cr-Original-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#14205}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: f8a4ecc4a188416aac76a6713f0ec0432f1ee49e

Alkalyne/webrtctrunk,Alkalyne/webrtctrunk,Alkalyne/webrtctrunk,Alkalyne/webrtctrunk,Alkalyne/webrtctrunk,Alkalyne/webrtctrunk,Alkalyne/webrtctrunk,Alkalyne/webrtctrunk