[sheriff] Disable flaky autofill test on Android M emulator bots

AutofillAssistantKeyboardIntegrationTest#keyboardDoesNotShowOnElementClickInIFrame
is failing on builder "android-marshmallow-x86-rel-non-cq"

Bug: 1131717
Change-Id: I14df97017da3c96622137a801d1c359e2a1f3ea3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2612971
Auto-Submit: Alex Ilin <alexilin@chromium.org>
Reviewed-by: Boris Sazonov <bsazonov@chromium.org>
Commit-Queue: Boris Sazonov <bsazonov@chromium.org>
Cr-Commit-Position: refs/heads/master@{#841048}

testing/buildbot/filters/android.emulator_m.chrome_public_test_apk.filter

@@ -87,3 +87,6 @@
 # crbug.com/1146477
 -org.chromium.chrome.browser.autofill.AutofillUpstreamTest.testSaveCardInfoBarWithEmptyMonth
 -org.chromium.chrome.browser.autofill.AutofillUpstreamTest.testSaveCardInfoBarWithEmptyMonthAndYear
+
+# crbug.com/1131717
+-org.chromium.chrome.browser.autofill_assistant.AutofillAssistantKeyboardIntegrationTest.keyboardDoesNotShowOnElementClickInIFrame