Make audio device mocks publicly visible
Make audio device mocks publicly visible

Bug: webrtc:11642
Change-Id: Ic80afca85b9f5854607aa55c403f77bd5bae1c71
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/203320
Reviewed-by: Mirko Bonadei <d2c43c210eae6feef04f53bae50885e8152edcca@webrtc.org>
Commit-Queue: Steve Anton <93f73658da16553b94c040887a439a155812e54e@webrtc.org>
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#33059}

TimothyGu/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,TimothyGu/libilbc