Added empty directory with myself as owner for new mixer.

NOTRY=True

Review-Url: https://codereview.webrtc.org/2109133003
Cr-Original-Commit-Position: refs/heads/master@{#13345}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: 03dd6db5cb7d6552ce84d44b24fa5bfb53fad6ac
1 file changed