Merge "Call apexd --unmount-all at the end of otapreopt_chroot run" am: ae453297d5 am: 2ac3f56605 am: 97c546e83b

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

Change-Id: I43b266d625c044afb987e816da246e4511d92c07