To enable the Unity Remote app for testing mobile controls in the Unity editor, you follow the path Edit > Project Settings > Editor. This section of the Project Settings is specifically designed to manage how the Unity editor interacts with devices, including mobile platforms. By accessing this menu, you'll find options related to Unity Remote, which facilitate connecting your mobile device to the Unity editor for real-time testing of controls and gameplay.
This path is pertinent because Unity Remote serves as a bridge that allows developers to test their mobile interfaces and inputs directly while they are developing in the editor. It simplifies the development process for mobile projects by allowing immediate feedback on how the touch controls function, thus enhancing the efficiency of the testing phase.
Other menu paths do not serve this function directly. Player Settings deal more with build configurations and player-specific options rather than real-time testing with Unity Remote. The option relating to Window > Remote Settings might imply accessing features, but it isn't the correct menu to set up the Unity Remote app functionality. Similarly, Assets > Android Settings would pertain to asset management and configurations rather than focusing on the remote testing capabilities.