This is a follow up of https://webrtc-codereview.appspot.com/16979004/ The purpose of this CL is to add 5% as a level for optimizing the packet loss rate to report to Opus. Adding such a level makes the grid finer. BUG= R=tina.legrand@webrtc.org Review URL: https://webrtc-codereview.appspot.com/13179004 git-svn-id: http://webrtc.googlecode.com/svn/trunk@6902 4adac7df-926f-26a2-2b94-8c16560cd09d