Merge "aconfig: cache flag value in generated java code" into main am: da886603

Original change: https://android-review.googlesource.com/c/platform/build/+/2802758



Change-Id: I7c0bdee071f4be54f28be230599751088dd2f27f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>