Bug 1719392 - update CLIENTS_TTL to be 180 days instead of 21 r=markh

Differential Revision: https://phabricator.services.mozilla.com/D152713

services/sync/modules/engines/clients.js

@@ -55,7 +55,7 @@ const { PREF_ACCOUNT_ROOT } = ChromeUtils.import(
   "resource://gre/modules/FxAccountsCommon.js"
 );
 
-const CLIENTS_TTL = 1814400; // 21 days
+const CLIENTS_TTL = 15552000; // 180 days
 const CLIENTS_TTL_REFRESH = 604800; // 7 days
 const STALE_CLIENT_REMOTE_AGE = 604800; // 7 days