Add WebRTC-Audio-NetEqDecelerationTargetLevelOffset to field trial config

Bug: 990342
Change-Id: I54c4ca1c0212ad737d67ba67828914ebfafdc7e4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1733488Reviewed-by: Brian White <bcwhite@chromium.org>
Reviewed-by: Steven Holte <holte@chromium.org>
Commit-Queue: Ruslan Burakov <kuddai@google.com>
Cr-Commit-Position: refs/heads/master@{#684289}

testing/variations/fieldtrial_testing_config.json

@@ -6234,6 +6234,22 @@
             ]
         }
     ],
+    "WebRTC-Audio-NetEqDecelerationTargetLevelOffset": [
+        {
+            "platforms": [
+                "android",
+                "windows",
+                "mac",
+                "chromeos",
+                "linux"
+            ],
+            "experiments": [
+                {
+                    "name": "Enabled-85"
+                }
+            ]
+        }
+    ],
     "WebRTC-Audio-NetEqDelayHistogram": [
         {
             "platforms": [