emulator: Disable flaky tests in HomepagePromoTest on M

Currently they have been disabled on Emulator on Pie.
See https://crbug.com/1077316#c1

Bug: 1077316, 1022533
Change-Id: I0a9d917a650e27c477ef7f693010f2c8e1bd07f7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2229878
Auto-Submit: Haiyang Pan <hypan@google.com>
Reviewed-by: Wenyu Fu <wenyufu@chromium.org>
Commit-Queue: Wenyu Fu <wenyufu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#775176}

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

@@ -41,7 +41,9 @@
 # crbug.com/1041233
 -org.chromium.chrome.browser.gesturenav.NavigationHandlerTest.testSwipeNavigateOnNativePage
 -org.chromium.chrome.browser.gesturenav.NavigationHandlerTest.testSwipeNavigateOnRenderedPage
-#
+
 # crbug.com/1062055
 -org.chromium.chrome.browser.metrics.StartupLoadingMetricsTest.testWebApkStartRecorded
 
+# crbug.com/1077316
+-org.chromium.chrome.browser.ntp.cards.promo.HomepagePromoTest.testChangeHomepageAndUndo_*