Roll src/third_party/openscreen/src/ 2c5e3d4c9..8b5e9a483 (4 commits)

https://chromium.googlesource.com/openscreen/+log/2c5e3d4c9d60..8b5e9a4830ef

$ git log 2c5e3d4c9..8b5e9a483 --date=short --no-merges --format='%ad %ae %s'
2019-12-20 jophba Fix build issues in Chrome causing unit tests build to fail
2019-12-18 rwkeane mDNS: Add Known Answer Suppression to Querier
2019-12-20 rwkeane mDNS: Responder Known Answer Suppression
2019-12-19 btolsch Clear fqdn in mDNSResponder setup

Created with:
  roll-dep src/third_party/openscreen/src

TBR=mfoltz@chromium.org

Change-Id: Ic815d00d8e490271c395b9caaba56e454471fa25
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1978845Reviewed-by: Yuri Wiitala <miu@chromium.org>
Commit-Queue: Jordan Bayles <jophba@chromium.org>
Cr-Commit-Position: refs/heads/master@{#726992}

DEPS

@@ -1254,7 +1254,7 @@ deps = {
     Var('chromium_git') + '/external/github.com/cisco/openh264' + '@' + '6f26bce0b1c4e8ce0e13332f7c0083788def5fdf',
 
   'src/third_party/openscreen/src':
-    Var('chromium_git') + '/openscreen' + '@' + '2c5e3d4c9d608a3dfaf075a27f4c5914ce4418ec',
+    Var('chromium_git') + '/openscreen' + '@' + '8b5e9a4830efe03b7d8e737025808ceaedd0ed14',
 
   'src/third_party/openxr/src': {
     'url': Var('chromium_git') + '/external/github.com/KhronosGroup/OpenXR-SDK' + '@' + '46d7cb392019e934e2944bdd317be8ed5176b3f2',