[autofill] isolate 1 test from fieldtrial configs

This CL updates the AutofillMetricsTest.AutofillFormSubmittedState
to explicitly configure all of the relevant feature flags for its
test scenarios, instead of depending on the default state of some
feature flags.

Bug: 824834
Change-Id: I28c9506fce90fc796c6db0c889d7e3f860561971
Reviewed-on: https://chromium-review.googlesource.com/c/1320217Reviewed-by: Tommy Martino <tmartino@chromium.org>
Commit-Queue: Roger McFarlane <rogerm@chromium.org>
Cr-Commit-Position: refs/heads/master@{#605777}

components/autofill/core/browser/autofill_metrics_unittest.cc

@@ -6317,8 +6317,12 @@ TEST_F(AutofillMetricsTest, AutofillFormSubmittedState) {
   // of fields enforced.)
   {
     base::test::ScopedFeatureList features;
-    features.InitAndEnableFeature(
-        kAutofillEnforceMinRequiredFieldsForHeuristics);
+    features.InitWithFeatures(
+        // Enabled
+        {kAutofillEnforceMinRequiredFieldsForHeuristics,
+         kAutofillEnforceMinRequiredFieldsForQuery},
+        // Disabled
+        {});
     base::HistogramTester histogram_tester;
     base::UserActionTester user_action_tester;
     autofill_manager_->OnFormSubmitted(