behavior of the audio processing module is quite complex and hard to implement in a threadsafe and efficient manner. Therefore a new scheme for setting the parameters in the audio processing module is introduced in this CL. The idea is to roll this scheme out gradually and as a first functionality in the audio processing module where this is applied the level controller was chosen. This CL includes the replacement of the Config-based level controller scheme with the new scheme. TBR=henrik.lundin@webrtc.org, solenberg@webrtc.org, BUG=webrtc:5298 Review-Url: https://codereview.webrtc.org/2338493002 Cr-Commit-Position: refs/heads/master@{#14190}