Merge "init.rc: create /metadata/aconfig, /metadata/aconfig/flags and...

Merge "init.rc: create /metadata/aconfig, /metadata/aconfig/flags and /metadta/aconfig/boot dirs" into main am: 48a45242

Original change: https://android-review.googlesource.com/c/platform/system/core/+/2960463



Change-Id: Ief89fc5892275f3b52b237504aec5ab76341053e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>