Merge "Disallow fastboot to modify locked DSU" into main am: 66b68dde92 am: a564954bc8

Original change: https://android-review.googlesource.com/c/platform/system/core/+/2744993

Change-Id: Ie8d0b38ee04980bea76d0c86777b86aafdf6f66b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>