Initial import of rules_java. am: 4ba159a9c4 am: 640e0bdda9 am: fb2d8c8a4e am: 926d40d0a4

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

Change-Id: I29d058c0999b439199ba15a30de3bf46e7e1171d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>