Bug 1888730 [wpt PR 45437] - Update wpt metadata, a=testonly

wpt-pr: 45437
wpt-type: metadata

Author: moz-wptsync-bot

testing/web-platform/meta/clipboard-apis/async-navigator-clipboard-write-multiple.tentative.https.sub.html.ini

@@ -1,7 +1,10 @@
 # XXX(krosylight): The test fails without the testing pref, see bug 1888182
 prefs: [dom.events.testing.asyncClipboard:true]
-
 [async-navigator-clipboard-write-multiple.tentative.https.sub.html]
   [clipboard.write() should cancel the prior pending one (same-origin iframe)]
     expected:
       if (os == "android") and not debug: [PASS, FAIL]
+
+  [clipboard.write() should cancel the prior pending one (same document)]
+    expected:
+      if (os == "android") and not debug: [PASS, FAIL]