Added AEC3 parameter for specifying that the setup has clock drift
Added AEC3 parameter for specifying that the setup has clock drift

Bug: webrtc:8940
Change-Id: Ic29af185ecb212d7d27bafc8432033bdd35c6d3b
Reviewed-on: https://webrtc-review.googlesource.com/58060
Reviewed-by: Gustaf Ullberg <3619ad972adf2eeb42172b0d9b4d612d59d226c7@webrtc.org>
Commit-Queue: Per Åhgren <3616c2c8a2c30a769c5419f89b4a810ea6e2f079@webrtc.org>
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#22199}
TimothyGu/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc