TF-3956 Add try/catch for get config cozy to avoid print exception when change responsive on web

Signed-off-by: dab246 <tdvu@linagora.com>

cozy/lib/cozy_config_manager/cozy_config_manager_web.dart

@@ -14,7 +14,11 @@ class CozyConfigManager {
   }
 
   Future<bool> get isInsideCozy async {
-    return _isInsideCozy ??= await _checkCozyEnvironment();
+    try {
+      return _isInsideCozy ??= await _checkCozyEnvironment();
+    } catch (e) {
+      return false;
+    }
   }
 
   Future<bool> _checkCozyEnvironment() async {