This new histogram will log a value every time input clipping is detected. The value is a boolean, with "true" meaning that the gain was in fact adjusted in response to the detected clipping, and "false" meaning that adjustment was not allowed due to kClippedLevelMin. BUG=webrtc:6622 Review-Url: https://codereview.webrtc.org/2522543006 Cr-Commit-Position: refs/heads/master@{#15196}