In InputVolumeController/MonoInputVolumeController, set min_digital_gain_db_ and disable_digital_adaptive_ to fixed values ahead of replacing speech level target as well as digital gain minimum and maximum with target range parameters. In InputVolumeController, remove digital_adaptive_follows and min_digital_gain_db from the config as they are no longer needed. Bug: webrtc:7494 Change-Id: I1378b6e182224c41038c6d8c649e7a28961f73d4 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/280962 Reviewed-by: Alessio Bazzica <alessiob@webrtc.org> Commit-Queue: Hanna Silen <silen@webrtc.org> Cr-Commit-Position: refs/heads/main@{#38554}