Merge "aconfig: prototype AconfigFlagAccessor" into main am: 93937ac342

Original change: https://android-review.googlesource.com/c/platform/build/+/3025063

Change-Id: I380ff734c216dfbf4b59380b71cdc5b9f92c8e99
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>