Add WebRTC-Bwe-LossBasedControl to the testing config.

This experiment was stopped a while ago after I mistook a configuration
error for a regression. It has since been removed from the testing
config. This CL restores it with the updated key. It also removes an
entry that was erroneously added earlier.

Bug: chromium:941413
Change-Id: I4504fdbaa026bba2bc715d492f59be0dba7efa4d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1768425Reviewed-by: Brian White <bcwhite@chromium.org>
Commit-Queue: Jonas Olsson <jonasolsson@chromium.org>
Cr-Commit-Position: refs/heads/master@{#690301}

testing/variations/fieldtrial_testing_config.json

@@ -6657,24 +6657,6 @@
             ]
         }
     ],
-    "WebRTC-AdaptiveLossThresholds": [
-        {
-            "platforms": [
-                "windows",
-                "mac",
-                "chromeos",
-                "linux",
-                "ios",
-                "android",
-                "android_webview"
-            ],
-            "experiments": [
-                {
-                    "name": "Enabled,balance_incr:5kbps,balance_decr:24kbps,exponent:0.7,resets:true"
-                }
-            ]
-        }
-    ],
     "WebRTC-Aec3AgcGainChangeResponseKillSwitch": [
         {
             "platforms": [
@@ -6788,6 +6770,24 @@
             ]
         }
     ],
+    "WebRTC-Bwe-LossBasedControl": [
+        {
+            "platforms": [
+                "windows",
+                "mac",
+                "chromeos",
+                "linux",
+                "ios",
+                "android",
+                "android_webview"
+            ],
+            "experiments": [
+                {
+                    "name": "Enabled,balance_incr:5kbps,balance_decr:24kbps,exponent:0.7,resets:true,decr:0.9"
+                }
+            ]
+        }
+    ],
     "WebRTC-Bwe-MaxRttLimit": [
         {
             "platforms": [