fix analyzer warning

Author: hiroshihorie

example/lib/theme.dart

@@ -32,8 +32,9 @@ class LiveKitTheme {
             foregroundColor: MaterialStateProperty.all<Color>(Colors.white),
             // backgroundColor: MaterialStateProperty.all<Color>(accentColor),
             backgroundColor: MaterialStateProperty.resolveWith((states) {
-              if (states.contains(MaterialState.disabled))
+              if (states.contains(MaterialState.disabled)) {
                 return accentColor.withOpacity(0.5);
+              }
               return accentColor;
             }),
           ),

lib/src/signal_client.dart

@@ -76,8 +76,9 @@ class SignalClient extends Disposable with EventsEmittable<SignalEvent> {
       // Attempt Validation
       try {
         final validateResponse = await http.get(validateUri);
-        if (validateResponse.statusCode != 200)
+        if (validateResponse.statusCode != 200) {
           throw ConnectException(validateResponse.body);
+        }
         throw ConnectException();
       } catch (error) {
         // Pass it up if it's already a `ConnectError`