Rebuild AAR when Java sources change
Summary:
This is a fairly aggressive heuristic, but that's fine as Gradle wont do
much if nothing relevant changed, so it's more important that we don't
miss anything.
Reviewers: apol
Reviewed By: apol
Subscribers: kde-frameworks-devel
Tags: Frameworks
Differential Revision: https://phabricator.kde.org/D18191