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

Merge "aconfig: cache flag value in generated java code" into main am: da886603 am: 6e1ac53b am: 94e5a15e

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



Change-Id: I355ea7af1068d71768e684891d3b2565dd78d9a1
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>