Merge "Revert "Revert "aconfig: @hide generated Java code""" into main am: 72c3b38a

Original change: https://android-review.googlesource.com/c/platform/build/+/2745644



Change-Id: I8af4c28f0388bafa543112a406a2082b6a0b9814
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>