Bug 1474365 Prevent submitting sync telemetry for self hosting users. r=markh

services/sync/modules/telemetry.js

@@ -513,7 +513,8 @@ class SyncTelemetryImpl {
   }
 
   submit(record) {
-    if (Services.prefs.prefHasUserValue("identity.sync.tokenserver.uri")) {
+    if (Services.prefs.prefHasUserValue("identity.sync.tokenserver.uri") ||
+      Services.prefs.prefHasUserValue("services.sync.tokenServerURI")) {
       log.trace(`Not sending telemetry ping for self-hosted Sync user`);
       return false;
     }