Update the test for the webrtc change that SDES cryptos are not included in SDP when DTLS is on.

BUG=349765

Review URL: https://codereview.chromium.org/183883031

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@255460 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 255460