fix android build

Author: ceceppa

examples/bare/android/app/build.gradle

@@ -11,7 +11,7 @@ react {
     //   The root of your project, i.e. where "package.json" lives. Default is '../..'
     // root = file("../../")
     //   The folder where the react-native NPM package is. Default is ../../node_modules/react-native
-    // reactNativeDir = file("../../node_modules/react-native")
+    reactNativeDir = file("../../../../node_modules/react-native")
     //   The folder where the react-native Codegen package is. Default is ../../node_modules/@react-native/codegen
     // codegenDir = file("../../node_modules/@react-native/codegen")
     //   The cli.js file which is the React Native CLI entrypoint. Default is ../../node_modules/react-native/cli.js