Merge "aconfig: move aconfig_storage_metadata proto and its apis to...

Merge "aconfig: move aconfig_storage_metadata proto and its apis to aconfig_storage_file crate" into main am: c045176c

Original change: https://android-review.googlesource.com/c/platform/build/+/2988856



Change-Id: I1dc399f46d1c9d4bf915eb6f1c221bbcca945b03
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>