Initial import of rules_java. am: 4ba159a9c4 am: 640e0bdda9

Original change: https://android-review.googlesource.com/c/platform/external/bazelbuild-rules_java/+/2637269

Change-Id: I178394c776639888ffbabacdad7cee56c01f617a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>