This CL adds functionality in the noise suppressor that allows the computational complexity to be reduced when the output of APM is not used. Bug: b/177830919 Change-Id: I849351ba9559fae770e4667d78e38abde5230eed Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/211342 Reviewed-by: Gustaf Ullberg <gustaf@webrtc.org> Commit-Queue: Per Åhgren <peah@webrtc.org> Cr-Commit-Position: refs/heads/master@{#33477}