Merge "remount: Remove AVB 1.0 code & opaque exit code" am: ae57e8da32

Original change: https://android-review.googlesource.com/c/platform/system/core/+/2241780

Change-Id: Icf53206a82e477359d2f09ded8f0093f6f6f65a6
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>