This just isn't used any more; get rid of it. We might want to put Gradle packages in the tree in the future, so keep mobile/android/gradle/m2repo. Review commit: https://reviewboard.mozilla.org/r/187356/diff/#index_header See other reviews: https://reviewboard.mozilla.org/r/187356/

The goal of this approach is to tell Gradle to not connect (or allow it to connect) to the network when fetching dependencies. No Android automation tasks should fetch from the network, except the toolchain tasks (which are specially intended to do so). It's difficult to arrange this without including the `--offline` flag everywhere. It _should_ be possible to set offline using an environment variable -- which would allow us to get rid of these dotgradle-* files -- but offline isn't an option in https://docs.gradle.org/4.2.1/userguide/build_environment.html#sec:gradle_configuration_properties (and certainly not in earlier versions either). Therefore, environment variable that points to an init.gradle file in automation. Before this patch, the files telling Gradle whether to start offline were fetched from tooltool. That's just a layer that doesn't need to be there. None of this impacts local developers. Review commit: https://reviewboard.mozilla.org/r/187358/diff/#index_header See other reviews: https://reviewboard.mozilla.org/r/187358/

Comment on attachment 8916126 [details] Bug 1406196 - Pre: Cull unused Gradle plugin. Review request updated; see interdiff: https://reviewboard.mozilla.org/r/187356/diff/1-2/

Comment on attachment 8916127 [details] Bug 1406196 - Move GRADLE_USER_HOME in tree. Review request updated; see interdiff: https://reviewboard.mozilla.org/r/187358/diff/1-2/