Added ToString functions in a separate header and move the ostream operators to a test only header. Bug: webrtc:8982 Change-Id: If547173aa39bbae2244531e2d3091886f14eae31 Reviewed-on: https://webrtc-review.googlesource.com/65280 Commit-Queue: Sebastian Jansson <srte@webrtc.org> Reviewed-by: Jonas Olsson <jonasolsson@webrtc.org> Cr-Commit-Position: refs/heads/master@{#22674}