flag guard transition to use mainline aconfigd am: f76d76e70d

Original change: https://android-review.googlesource.com/c/platform/system/server_configurable_flags/+/3388573

Change-Id: I7835d0260a3a99e284591caea698df2da50644c7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>