OmniboxTest* in chrome_public_test_apk is flaky.

Findit has detected 3 flake occurrences of tests below within
the past 24 hours:

org.chromium.chrome.browser.omnibox.OmniboxTest#testAutoCompleteAndCorrectionLandscape
org.chromium.chrome.browser.omnibox.OmniboxTest#testDuplicateAutocompleteTextResults
org.chromium.chrome.browser.omnibox.OmniboxTest#testSimpleUse

Please try to find and revert the culprit if the culprit is obvious.
Otherwise please find an appropriate owner.