How to change App name?
Open file android/app/src/main/res/values/strings.xml and change it to your App name.
How to configure build version and application ID of your app?
Open file android/app/build.gradle and change it to your name own build version and application ID.
Get more information about ApplicationId: https://developer.android.com/studio/build/application-id
Note: After changing the ApplicationId you need to update google-services.json file located in android/app/google-services.json you can navigate to step Login Google to know how to create and download that file.
How to change Splash Screen Image?
Replace all images with same size in folder android/app/src/main/res/drawable-*
Don't forget to clean the cache after change app info via the command line or terminal in macOS.
cd ./android && ./gradlew clean