[android] Update inline update notification test config

The inline update experiment data has shown that we want to
use the best effort version of the feature config to be able
to reach as many users as possible.

This changes the default configuration to be the version
without notifications, and using best_effort.

Bug: 884914
Change-Id: Iccecb804bf21501640170343584666a9c1a07c25
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2013814
Commit-Queue: Ilya Sherman <isherman@chromium.org>
Reviewed-by: Ilya Sherman <isherman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#734277}

testing/variations/fieldtrial_testing_config.json

@@ -422,10 +422,9 @@
             ],
             "experiments": [
                 {
-                    "name": "Enabled_WithNotification",
+                    "name": "Enabled_NoNotification",
                     "params": {
-                        "update_notification_interval_days": "21",
-                        "update_notification_state": "true"
+                        "flow": "best_effort"
                     },
                     "enable_features": [
                         "InlineUpdateFlow"