Merge "aconfig: generate Java flag name constants" am: cff292f8

Original change: https://android-review.googlesource.com/c/platform/build/+/2611170



Change-Id: I21da79301c4dc8828c6b4b48923720121dc91342
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>