Merge "second-stage-init: Don't move submounts when mounting overlayfs" into main am: 475599f5

Original change: https://android-review.googlesource.com/c/platform/system/core/+/2845633



Change-Id: Iece55e58c7f4af67d4a341f698cbca14781a0396
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>