Add M79 experiments to fieldtrial_testing_config file.

This change adds:
- OmniboxOnFocusSuggestions and
- OmniboxDisableInstantExtendedLimit

to fieldtrial_testing_config file.

Change-Id: I67254c8dd7fc70756be96a13a6346178fb5d4769
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2028661Reviewed-by: Mark Pearson <mpearson@chromium.org>
Reviewed-by: Tommy Li <tommycli@chromium.org>
Commit-Queue: Ender <ender@google.com>
Cr-Commit-Position: refs/heads/master@{#738828}

testing/variations/fieldtrial_testing_config.json

@@ -4203,10 +4203,15 @@
             "experiments": [
                 {
                     "name": "AndroidExperiments",
+                    "params": {
+                        "ZeroSuggestVariant:1:*": "Local",
+                        "ZeroSuggestVariant:7:*": "Local",
+                        "ZeroSuggestVariant:8:*": "Local",
+                        "rounded_edges": "true"
+                    },
                     "enable_features": [
-                        "OmniboxDisplayTitleForCurrentUrl",
-                        "OmniboxUIExperimentHideSteadyStateUrlScheme",
-                        "OmniboxUIExperimentHideSteadyStateUrlTrivialSubdomains"
+                        "OmniboxDisableInstantExtendedLimit",
+                        "OmniboxOnFocusSuggestions"
                     ]
                 }
             ]