Enable GN check in voice_engine/
Enable GN check in voice_engine/

BUG=webrtc:6828
NOTRY=True

Review-Url: https://codereview.webrtc.org/2714353002
Cr-Original-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#16986}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: cfa95aa99559ffa9bb48ddc5d7867f238310b1e1

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