Declare repositories and project name in settings.gradle

Official gradle docs recommend using settings.gradle file (see https://docs.gradle.org/current/userguide/organizing_gradle_projects.html#always_define_a_settings_file). Blank Android projects in Android Studio declare their name and repositories in settings.gradle. Therefore, it makes sense to create such file here and add that information in it.

An explicit project name allows us to know exactly to what project.name resolves, instead of relying on the project root directory name, which can be changed by the developer locally.