Merge "Call apexd --unmount-all at the end of otapreopt_chroot run" am: ae453297d5 am: 2ac3f56605

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/1665889

Change-Id: I6af7d418c8d6edced124a989e87c9749298d353a