IntelliJ IDEA code style settings for Square's Java and Android projects.

These code styles aren't maintained anymore. Block / Square has adopted ktfmt with its code style. .editorconfig files are a better alternative to share code styles and are supported in Jetbrains IDEs.

• On Unix, run the install.sh script. Windows users should use install.bat instead.
• Restart IntelliJ if it's running.
• Open IntelliJ Project Settings -> Code Styles, change the code style for the project to the one you want.