Once you finish the development and customization of your Android system, it is time to release your images. For that you need to follow these steps:
The first step is the generation of target_file zip to be used in later stage of release.
After the first step, the generated files are signed with test-keys publicly known. You should create your own private keys and use them to replace the test-keys.
Once you have your target_files zip already signed, you can: