This move the functionality of applying the lower bound of a network estimate to AimdRateControl::ClampBitrate instead of ChangeBitrate. The purpose is to be able to also clamp probe estimates set by AimdRateControl::SetEstimate as well. Bug: none Change-Id: I6a4d64d2e98bb99da06010e2edaf20dc42880e37 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/255823 Reviewed-by: Per Kjellander <perkj@webrtc.org> Commit-Queue: Per Kjellander <perkj@webrtc.org> Reviewed-by: Diep Bui <diepbp@webrtc.org> Cr-Commit-Position: refs/heads/main@{#36219}