Merge "aconfig: add java codegen test mode" am: 514f99b2 am: a99ddd3b

Original change: https://android-review.googlesource.com/c/platform/build/+/2638410



Change-Id: I0d1096a7554f695b8a57f7c618c2c0e220a18dcc
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>