Merge "remount: Detect when flashall has happened in the bootloader." into...

Merge "remount: Detect when flashall has happened in the bootloader." into main am: 6f03bd72 am: 9e8b3ce8 am: 4e857309

Original change: https://android-review.googlesource.com/c/platform/system/core/+/2871216



Change-Id: If2e60c7ab88310fe6d6bb4c32c8a3e8318c2e198
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>