Disabling flaky AutofillMetricsTest.FormFillDuration test

Example:
https://ci.chromium.org/p/chromium/builders/try/linux_chromium_tsan_rel_ng/384805

TBR=parastoog@google.com

Bug: 1009364
Change-Id: I573054886372babd541a83bf67e1842180677deb
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1831900Reviewed-by: Sergey Poromov <poromov@chromium.org>
Commit-Queue: Sergey Poromov <poromov@chromium.org>
Cr-Commit-Position: refs/heads/master@{#701072}

components/autofill/core/browser/autofill_metrics_unittest.cc

@@ -7463,7 +7463,8 @@ TEST_F(AutofillMetricsTest, UserHappinessFormInteraction_AddressForm) {
 }
 
 // Verify that we correctly log metrics tracking the duration of form fill.
-TEST_F(AutofillMetricsTest, FormFillDuration) {
+// TODO(crbug.com/1009364) Test is flake on many builders.
+TEST_F(AutofillMetricsTest, DISABLED_FormFillDuration) {
   // Load a fillable form.
   FormData form;
   form.name = ASCIIToUTF16("TestForm");