Merge "Revert "aconfig: cache flag value in generated java code"" into main...

Merge "Revert "aconfig: cache flag value in generated java code"" into main am: 0989dcd6 am: 519c1eca

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



Change-Id: I00977798736422fc05cfddf67f108a58bba7405c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>