storaged: protect global proto_loaded am: 33206d39 am: 0ed516e7 am: 36d60929 am: 5ef7c012

Original change: https://googleplex-android-review.googlesource.com/c/platform/system/core/+/13113445



Change-Id: Iadd93e0db8e5e77df589b2cc891799514d10b7e9
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>