[omnibox] Enable the local entity chrome://flags flag on mobile platforms.

Bug: 950512
Change-Id: Ia670e8f931e886e4298ba07f9cd7f8cdd328e8da
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1897484Reviewed-by: manuk hovanesian <manukh@chromium.org>
Reviewed-by: Tommy Li <tommycli@chromium.org>
Commit-Queue: manuk hovanesian <manukh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#712229}

chrome/browser/about_flags.cc

@@ -2777,7 +2777,7 @@ const FeatureEntry kFeatureEntries[] = {
 
     {"omnibox-local-entity-suggestions",
      flag_descriptions::kOmniboxLocalEntitySuggestionsName,
-     flag_descriptions::kOmniboxLocalEntitySuggestionsDescription, kOsDesktop,
+     flag_descriptions::kOmniboxLocalEntitySuggestionsDescription, kOsAll,
      FEATURE_VALUE_TYPE(omnibox::kOmniboxLocalEntitySuggestions)},
 
     {"omnibox-experimental-suggest-scoring",