Merge "Revert "aconfig: cache flag value in generated java code"" into main am: 0989dcd6

Original change: https://android-review.googlesource.com/c/platform/build/+/2809793



Change-Id: I2390d7d78a293cdd99992f7533dec01d6822c8e1
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>