Bug 1595868 [wpt PR 20217] - Update wpt metadata, a=testonly

wpt-pr: 20217
wpt-type: metadata

testing/web-platform/meta/installedapp/idlharness.https.window.js.ini

@@ -0,0 +1,7 @@
+[idlharness.https.window.html]
+  [Navigator interface: operation getInstalledRelatedApps()]
+    expected: FAIL
+
+  [Navigator interface: navigator must inherit property "getInstalledRelatedApps()" with the proper type]
+    expected: FAIL
+

testing/web-platform/meta/installedapp/installedapp.https.window.js.ini

@@ -0,0 +1,7 @@
+[installedapp.https.window.html]
+  [Calling getInstalledrelatedApps from an iframe fails]
+    expected: FAIL
+
+  [Check calling getInstalledRelatedApps works as expected]
+    expected: FAIL
+