* Move Hilt setup to convention plugin
* Disable Hilt on modules where it's not needed
* Enable non-transitive R classes
* Fix `configuration` blocks called in wrong scope
* Move imperative Flavors code from build.gradle
* Disable unnecessary build features globally
* Disable configure-on-demand as it's not encouraged
* Don't use internal AGP packages in plugins
Change-Id: I1bee3e3fd0103054637b979a350f9fd2312ae8ba