[telemetry] Add Monsoon protocol library.

BUG=None.
TEST=trybots
R=dannyb@google.com, tonyg@chromium.org

Review URL: https://codereview.chromium.org/75803002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@241384 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 241384