[AUTOMATED]: Prettier Code Styling

Author: Feiyang1

packages/database/src/core/PersistentConnection.ts

@@ -15,12 +15,7 @@
  * limitations under the License.
  */
 
-import {
-  contains,
-  isEmpty,
-  safeGet,
-  CONSTANTS
-} from '@firebase/util';
+import { contains, isEmpty, safeGet, CONSTANTS } from '@firebase/util';
 import { stringify } from '@firebase/util';
 import { assert } from '@firebase/util';
 import { error, log, logWrapper, warn, ObjectToUniqueKey } from './util/util';