Bug 1874353 [wpt PR 43960] - Update wpt metadata, a=testonly

wpt-pr: 43960
wpt-type: metadata

Author: moz-wptsync-bot

testing/web-platform/meta/cookies/third-party-cookies/third-party-cookie-heuristics.tentative.https.html.ini

@@ -0,0 +1,5 @@
+[third-party-cookie-heuristics.tentative.https.html]
+  expected:
+    if (os == "android") and not debug: [OK, TIMEOUT]
+  [3P fetch: Cross site window setting HTTP cookies]
+    expected: FAIL

testing/web-platform/meta/cookies/third-party-cookies/third-party-cookies.tentative.https.html.ini

@@ -3,5 +3,7 @@
     expected: FAIL
 
   [3P fetch: Cookies are not accessible via HTTP]
-    expected:
-      if os == "android": FAIL
+    expected: FAIL
+
+  [3P fetch: Cross site window setting HTTP cookies]
+    expected: FAIL