storaged: protect global proto_loaded am: 33206d393c am: 0ed516e795 am: 36d6092946 am: 5ef7c0126c am: f79804a805 am: 6800007ef5

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

Change-Id: Ib6525d661bc932f0b40e3ac5c091f523b6b62d14
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>