Make a separate android entry for enabling ServiceWorkerForegroundPriority in...

Make a separate android entry for enabling ServiceWorkerForegroundPriority in the fieldtrial_testing_config.json.

Bug: 928904
Change-Id: Id94e960c6a2031f854e92855011b585b3c61c4bb
Reviewed-on: https://chromium-review.googlesource.com/c/1474112Reviewed-by: Alexei Svitkine <asvitkine@chromium.org>
Commit-Queue: Ben Kelly <wanderview@chromium.org>
Cr-Commit-Position: refs/heads/master@{#632749}

testing/variations/fieldtrial_testing_config.json

@@ -4382,8 +4382,6 @@
     "ServiceWorkerForegroundPriority": [
         {
             "platforms": [
-                "android",
-                "android_webview",
                 "chromeos",
                 "linux",
                 "mac",
@@ -4399,6 +4397,22 @@
             ]
         }
     ],
+    "ServiceWorkerForegroundPriorityAndroid": [
+        {
+            "platforms": [
+                "android",
+                "android_webview"
+            ],
+            "experiments": [
+                {
+                    "name": "Enabled",
+                    "enable_features": [
+                        "ServiceWorkerForegroundPriority"
+                    ]
+                }
+            ]
+        }
+    ],
     "ServiceWorkerServicification": [
         {
             "platforms": [