Bazel: Consume auto-value artifacts from plugin-api

Auto-value* annotation processors are shaded into plugin-api, so that
there is no needs to fetch them separately.

Also mark auto-value* libraries as neverlink, to avoid auto-value*
annotation processors leaking into final plugin artifact.

Release-Notes: skip
Change-Id: I1157ed8733efb2b6134070ba6d4eee903e9fbb14
2 files changed