emulator: Disable the following flaky tests on chrome_public_test_apk in MM

* StartSurfaceLayoutTest#testShowOnlyOneTabSuggestionMessageCard_withSoftCleanup
* StartSurfaceLayoutTest#testShowOnlyOneTabSuggestionMessageCard_withHardCleanup

Bug: 1130621
Change-Id: I47b1fb54d491fb9973ad2d3be564011775d5505a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2422438
Auto-Submit: Haiyang Pan <hypan@google.com>
Reviewed-by: Yuke Liao <liaoyuke@chromium.org>
Commit-Queue: Yuke Liao <liaoyuke@chromium.org>
Cr-Commit-Position: refs/heads/master@{#808969}

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

@@ -80,3 +80,7 @@
 # crbug.com/1077552
 -org.chromium.chrome.features.start_surface.StartSurfaceLayoutTest.testRenderGrid_10WebTabs
 -org.chromium.chrome.features.start_surface.StartSurfaceLayoutTest.testRenderGrid_10WebTabs_InitialScroll
+
+# crbug.com/1130621
+-org.chromium.chrome.features.start_surface.StartSurfaceLayoutTest.testShowOnlyOneTabSuggestionMessageCard_withSoftCleanup
+-org.chromium.chrome.features.start_surface.StartSurfaceLayoutTest.testShowOnlyOneTabSuggestionMessageCard_withHardCleanup