使用真机测试，每次运行 java 语言都必须要安装一遍 app 吗？如果想不安装，该如何做？
public void setup() throws Exception{
DesiredCapabilities capabilities = new DesiredCapabilities();
capabilities.setCapability(CapabilityType.BROWSER_NAME, "");
capabilities.setCapability("platformVersion", "4.2.2");
capabilities.setCapability("platformName", "android");
capabilities.setCapability("deviceName", "c33d476a");
capabilities.setCapability("app", "C:/Users/Administrator/Desktop/jsmcc_T.apk");
driver = new AppiumDriver(new URL("http://127.0.0.1:4723/wd/hub"), capabilities);
}