feat: Adds ts rule noImplicitOverride and fix errors.

react/features/security/components/security-dialog/native/SecurityDialog.tsx

@@ -163,7 +163,7 @@ class SecurityDialog extends PureComponent<IProps, IState> {
      *
      * @inheritdoc
      */
-    render() {
+    override render() {
         return (
             <JitsiScreen style = { styles.securityDialogContainer }>
                 { this._renderLobbyMode() }