Roll third_party/openscreen dependency

This patch rolls openscreen to the latest HEAD.

Change-Id: I9890293e3b2ed62a702bd0aa08a0615cf26798a2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1618022Reviewed-by: Brandon Tolsch <btolsch@chromium.org>
Commit-Queue: Jordan Bayles <jophba@chromium.org>
Cr-Commit-Position: refs/heads/master@{#661020}

DEPS

@@ -1154,7 +1154,7 @@ deps = {
     Var('chromium_git') + '/external/github.com/cisco/openh264' + '@' + '6f26bce0b1c4e8ce0e13332f7c0083788def5fdf',
 
   'src/third_party/openscreen/src':
-    Var('chromium_git') + '/openscreen' + '@' + 'b1d095ba4f8f3ec1efd90dbd5cb0a37e5b4b21f7',
+    Var('chromium_git') + '/openscreen' + '@' + '9ade415f62a7f5d2b4233a103488c5a5cf08fc45',
 
   'src/third_party/ow2_asm': {
       'packages': [