src:android-platform-build also has build-profiles, which eliminates
the circular dependency. Beyond Nougat, this circular dependency would
be removed since android-platform-build-headers are no longer needed.
Out of topic here: Build-profiles are pretty good ways to deal with
bootstrapping issues! However I would like to see the support of
build-profiles in Buildd, since manually removing <!stage1> entries in
d/control and preparing a "~stage1" version isn't very elegant, as we
have been doing in the Nougat updates. See