Avoid including audio_processing.h from within AEC3. Bug: webrtc:8844 Change-Id: I02c475c2fb84e2c24eac86baac3c7edaa08bebc0 Reviewed-on: https://webrtc-review.googlesource.com/53065 Commit-Queue: Gustaf Ullberg <gustaf@webrtc.org> Reviewed-by: Per Åhgren <peah@webrtc.org> Cr-Commit-Position: refs/heads/master@{#22029}